308 ballistics by the inch

mostly) paid for everything ourselves, and we did not receive any kind of sponsorship The 7.62 NATO was designed with two key factors in mind: the ability to facilitate smoother insertion and extraction of rounds during automatic fire, and the ability to handle the inevitably looser tolerances of ammunition manufactured by different NATO members. This was an average decrease of 77.6 feet/second per inch of barrel length. A. In experienced hands it can hit a 1,000 yard target. polygonal rifling + All these details have been generated using our . NOTE: Many shooting newbies may see the number combination 7.62 and assume that it is referencing the NATO round, but without the NATO designation, make sure that combination is followed by a 51 instead of some other number. The NATO 51 round first entered service in the 1950s but lacks the R of the rimmed Russian round. 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js'; No guessing, no models, no arbitrary numbers. Wind Components are (Miles per Hour): DownRange: 0.0 Cross Range: 10.0 Vertical: 0.0. Why you ask? Dig around some, and youll likely find yourself scratching your head, wondering what the difference is between 7.62 and .308 rounds. No, personally, it seems like a silly idea to me. At each barrel length, the rifle was fired from a front rest with rear bags, with five rounds of each type of ammunition. We also have a 223 and 7 rem mag up there. Enter your email address to subscribe and receive notifications of new posts by email. By So while more reliable results will be obtained with a larger sample size, the data generated from a smaller sample is still of some use (provided it doesnt contain an outlier- which is why I dont know of anyone using data from single shots). This was with Varget powder. The barrel was cut off using a cold saw. The maximum effective range for accurate shooting for any round is that distance where the bullet's velocity drops below the speed-of-sound. Brian Smyth 308 Winchester: BBA JHP: 175: 2832: 2700: 308 Winchester Based on the data published in the Rifle Shooter article, the average of most efficient barrel length is 21.7 inches. The most significant decrease in barrel length occurred when the barrel was cut from 14 to 13. All in all, this was a very thorough test by the folks at RifleShooter.com. Create Your Free Custom Ballistic Report Liked this? I only had enough ammunition and time to test five rounds at each barrel length. CLICK HERE to Read the Rifleshooter.com Test. Shooting 320 rounds off a chassis on your first outing you get a feel for things. In the next frame you can see the gun recoiling (below). ga.src = ('https:' == document.location.protocol ? Note the change in MPBR averages 27 yards with an 11.5 inch change in barrel length. Tipped MatchKing (TMK) and VARGET, Mossberg 500: Cut, Crown and Choke Tube Installation, 6.5 Creedmoor load development: 16.5 inch barrel, 123 SMK and 140 SMK, Jewell trigger installation on Winchester 70/FN Special Police, Remington 700 Tactical .308 AAC-SD Review, Completing an 80% 10/22 Select Fire LLC RAZOR Semiautomatic Receiver, Scattergun Technologies Track-Lock II Ghost Ring Sight Installation on a Remington 870 Police Magnum, Removing a stuck pull-through cleaning kit, 308 WinchesterBarrel length in inches versus Muzzle velocity in feet-per-second (ft/sec), 308 Winchester Maximum Point Blank Range (MPBR) in yards for 8 Target. In addition to riding on the back of the 7.62 NATOs short-lived military career, the .308 took advantage of its ballistic and performance similarities to the already venerated .30-06 Springfield, the cartridge that won two world wars and held the line in Korea. Welcome Welcome to Ballistics By The Inch, or 'BBTI' as people have taken to calling it. A. The shot column represents the shot number in the respective string. He didnt shoot the 16 300 Winchester Magnum I made a few months ago either! I shook vigorously from head to toe. How much velocity do you think was lost, on average, for each 1 reduction in barrel length? which was specifically designed for long-range target shooting. Many have noted the 308 Win's shortcomings, often attributing a great deal of its popularity to mere tradition. At the urging of the federal government, the Small Arms and Ammunition Manufacturers Institute (SAAMI) was founded in 1926 as an association of the nations leading manufacturers of firearms, ammunition and components. The organization is tasked with creating, standardizing, and publishing technical firearms and ammunition data in order to promote quality, reliability, interchangeability, and safety within the firearms manufacturing and shooting communities. AVG change ft/sec per inch represents the average loss of velocity per inch based on the running averages. The 308 is slightly more powerful and has a longer range. CLICK HERE to Read the Rifleshooter.com Test. Great test ! I like them- in some ways you dont lose a lot. data is provided purely for entertainment purposes - to better facilitate arguments .308 Win Barrel Chop Test: How Velocity Changes with Length, RifleShooter.com .308 Win Barrel Cut-Down Velocity Test, .308 Win Velocity vs. Barrel Length 28 to 16.5 Cut-Down Test, Surprising Results in .223 Rem Barrel Cut-Down Velocity Test, Barrel Length and Velocity in a .223 Rem Barrel Cut-Down Test, http://rifleshooter.com/wp-content/uploads/2015/01/custom-16.5-rem-700-308.jpg. With F Open shooting it does take a lot of testing over a long time to come up with the sweet spot of barrel length for one powder type for barrel, bullet brand/weight/and design alone. The action had a 223 bolt face, so I opened it and installed a Sako extractor. We selected an 8 MPBR for comparison purposes, since this was the same size vital area we used for the 300 Winchester Magnum and 223 Remington barrel length articles. Troubleshooting seized ejectors. These figures give this bullet a 4.4 out of 20 power rank using our algorithm. Average velocity and standard deviation was logged for each round. I had 100% extraction during the course of this experiment. One note: in every case with the T/C Encore the length of the barrel There are plenty of good sources of information on this topic. If youve never slugged a bore (pushed a soft lead bullet through a barrel) you should, you would be surprised by the variations you can detect in the barrel. Contrary to the popular urban legend, 7.62 NATO casings do indeed have thicker walls than .308 Winchester brass despite their almost identical external dimensions. The new(ish) .300 Blackout bears a similar (albeit rare) designation of 7.6235, and the standard Russian sniper round is the 7.62x54R. .357 SIG, .38 Super Auto Colt, .35 Whelen, .300 Remington Ultra Magnum, .35 Remington, .44 Smith & Wesson Special, .380 Auto (9mm Browning Short), 10mm Auto, .25 Winchester Super Short Magnum (WSSM), .303 British, 6.5x54 MS (6.5 Mannlicher-Schoenauer), .300 Remington Short Action Ultra Magnum, .218 Bee, 6.8mm Remington SPC, .25-20 Winchester. Compare that to a 5.56 Ball M193 round's 55 grain bullet, which delivers a . class bullets. Doing the opposite is a bit more complicated. Nearly every target shooter had his teeth cut on a 308 Winchester. I cant find the source document and data set (he does have some nice graphs), but it seems the author is trying show you dont need a long barrel for long range shooting. 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js'; var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s); Since all of the rounds were fired on the same day, I also controlled for ambient temperature. For another measure of bullet power, some people prefer to use Muzzle Energy . Until then, stay safe. With tunning accuracy is 99.7%. Yes, I did for the 223 post. To learn more about the LSS and other MDT products, click here to visit their website. (function() { Interestingly, these numbers jive pretty well with estimates found in reloading manuals. In308 Winchester / 7.62x51mm NATO: Barrel Length versus Velocity (28 to 16.5), I cut gathered empirical data for muzzle velocity on four different loads from 28 to 16.5. No further tests will be conducted, but we will maintain this site and data for the use of Cartridge Type: RifleHeight: 2.015"Width: 0.473"Average FPS: 2681Average Energy: 2617Average Gr: 164Recoil: 1.95Power Rank: 4.4 of 20. _gaq.push(['_setAccount', 'UA-6323545-2']); Remington Model Seven Actions are available! Is the file picture at the top of the page real, or photoshopped? UPDATE 12/30/14: I tapered the barrel and installed a brake. For instance, the Berger Reloading manual says for the 308 Winchester, muzzle velocity will increase (or decrease) by approximately 20 fps per inch from a standard 24 barrel. The most significant decrease in barrel length occurred when the barrel was cut from 9 to 8. The velocity and standard deviation are recorded. Readers have continually asked for data from shorter barrels, so here it is! The cuts were made in one-inch intervals with a rotary saw. Is the reverse possible? Test Barrel Lost 22.7 FPS Per Inch (.308 Win Chambering) Since we would be gathering data on 52 different barrel length and ammunition combinations and would not be crowning the barrel after each cut, we decided to eliminate gathering data on group sizes. When you pull the trigger on your M14, it starts a chain reaction. the cylinder gap. calibers/cartridges + Here are some pics: I get this every so often. The following is a 1000 yard .308 ballistic chart that was created using our free online ballistic calculator and details all aspects of the bullets trajectory from the millisecond it leaves the barrel until the time it reaches the 1,000 yd mark. At that distance, it retains 400 ft lbs of energy. American Eagle (Federal) Full Metal Jacket Boat-Tail, 150gr. The muzzle blast was so violent, it chopped open my Edgewood bag when it got too close. Temperature was 47 F.. If you have a modern .308 Win. By firing the cartridges as soon as they were chambered, I attempted to reduce the effect of the hotchamber on muzzle velocity. This resulted in a velocity loss of 106 feet/second. The PowerRank is an estimation of the cartridge power. _gaq.push(['_setDomainName', '.accurateshooter.com']); I think he may be misquoting his source. This was the best one. The 7.6251 NATO chamber is imperceptibly longer than the .308 Winchester, extending between 0.006 and 0.010 inches beyond the .308 SAAMI specs. Out of the 4 recording I made, only two frames contained muzzle flash. Note: I also fired a 30 shots of the IMI Samson 7.62mm 150 grain FMJ with the 28 and 16.5 lengths- Ill discuss why later. Trajectory for Custom .308 165 TGK #4667 AMMO at 2680 Feet per Second. Ive had small screws fall out of the Jewel HVRs I use on some of my match guns. the firearms community. This is especially useful for hunters, of who many, will hold center mass of a vital area on game and dont want to dial in a correction. contrast, the chamber pressure of 5.56 NATO is only roughly 75% of that, at about 60,000 PSI, while 6.5 Creedmoor and .308 Win have only slightly higher chamber pressures at 62,000 PSI. I like it a lot. Ballistics by the Inch (often called BBTI) was a project to test the performance characteristics of a variety of common handgun calibers/cartridges. (Yes, grains are an actual measurement of weight.). I use a Forster Match Rife Headspace Gauge Kit. Barrel length, Barrel length and velocity, External Ballistic Data, Rifles In the coming weeks Ill be combining the data from both experiments into one post. This chart shows velocity changes for all four ammo varieties: Summary of Findings: The average velocity loss per inch, for all four ammo types combined, was 22.7 FPS. When we cut our 6mmBR barrel down from 33 to 28, we only lost about 8 FPS per inch. My data showed an average change of 27 ft/sec per inch of barrel. The ergonomics are great, plus I like the folding stock and modular forend. If they did, I would have noticed the first round fired for every barrel length slower then the subsequent rounds. These things are known to be pretty tough, so that should be an indication of how much recoil was generated. In 2009 an additional three calibers were tested and in 2010 and . For instance, when calculating maximum point blank zero for a 8 target, the projectile will never rise more than 4 above the line of sight or fall 4 below it. 300 Winchester Magnum: How Does Barrel Length Change Velocity- A 16 300 Win Mag? Do you see any use for a 10 308 Winchester? This is the point that a little more barrel will get a lot more from the round. Wind Direction is: 3.0 o'clock and a Wind Velocity of: 10.0 Miles per hour. Once data was gathered for each cartridge at a given barrel length, the rifle was cleared and the bolt was removed. The trigger releases the firing pin which strikes the primer on a chambered cartridge which in turn ignites the propellant. As one of the most commonly available rifle calibers in North America, the .308 Winchesters rise to fame is simultaneously impressive and unsurprising. This bullet weight, in frangible form, is favored by snipers, police marksmen and long range hunters. AVG 28 ft/sec and AVG 16.5 ft/sec both represent running average muzzle velocities in ft/sec for a given barrel length. As expected, the rate of velocity loss increases significantly per inch of barrel once you get below a 16 barrel length. Turning a sporter contour rifle barrel from a blank, 6.5 Creedmoor loads: 107 SMK IMR 8208 XBR and 142 SMK Superformance 6.5 Creedmoor made a name for itself based on performance with the 120-142 gr. He provides Task & Purpose readers with coverage of the best EDC and outdoor gear, although he has been known to write how-to articles and a few other goodies from time to time. The 300 Blackout's sleeker bullet has a higher ballistic coefficient than the 5.5645, but with less speed its trajectory invariably arcs more sharply. Its global proliferationin big game hunting rifles is matched by few other cartridges. The cut off saw works better than the reciprocating saw and the hack saw, plus it feels more scientific. Registration on or use of this site constitutes acceptance of our Terms of Service. To make the test even more interesting, four different types of .308 Win factory ammunition were chronographed at each barrel length. While the .30-06 was again proving itself in Korea, the Army experimented with a variant of the .300 Savage that is designated the T65. Good ergonomics, and a great value for the money. Hydra-Shok JHP: Speer 200 gr. The 6.5 Grendel's common 123 grain bullet offers a muzzle velocity of 2,580 fps, muzzle energy of 1,818 ft lbs, and ballistic coefficient of 0.506. However, the 308 Winchester is a short-action cartridge that has less recoil but is just as capable at normal hunting distances. The chops tests ranged in barrel length from 18" down to 3". or remuneration from anyone. 100% real. In fact the .308 Winchester 165gr bullet is traveling faster at 1000 yards than the .223 or 7.62x39mm at just 500 yds. The picture at the top of the page is an actual screen shot I took off my iPhone video recording. I would have guessed 150-200 feet/second velocity loss between 24 and 16.5 barrel lengths. This allows it to keep a supersonic muzzle velocity at 1,000 yards. ), a debate was starting about the practical efficiency (and accuracy) of fast twist, short barrel (16 18 inch) 308 Win and 300 Win. Since we first launched BBTI in November of 2008, it has become a primary reference tool for firearms enthusiasts of all stripes and from around the globe. My ears were ringing for a long time after the test, I shot it wearing double ear protection and without overhead covered. At each cut length, velocity was measured with a Magnetospeed chronograph. Much Different Results with 6mmBR and a Longer Barrel The barrel was cut off using a cold saw. My calculations assume a 1.75 sight over bore height. Rifleshooter.com and its authors, do not assume any responsibility, directly or indirectly for the safety of the readers attempting to follow any instructions or perform any of the tasks shown, or the use or misuse of any information contained herein, on this website. home + This video from our friends over at Brownells have just what youre looking for. Yes, I guess I did. Mag. data page, and a link to a muzzle energy graph on each caliber page. What are possible sources of error in your experiment? We also did do a sequence of tests out of the full length of the barrel blanks, just out of curiosity. .277 Fury has a -41 inch drop at 500 yards . The IMI Samson 150 grain FMJ is a 7.62x51mm NATO spec cartridge. I tried to select a cross section of cartridges that would be of interest to a wide variety of shooters. Rifleshooter.com also offers ballistics graphs showing trajectories with different barrel lengths. Increasing this sample size would increase the reliability of these results. 7.62 NATO (a.k.a., 7.62x51mm) and .308 Winchester are two very common rifle cartridges commonly used by U.S. service members and civilians. While the .308 Winchester is the civilian competitor and is frequently employed in hunting rifles and military replica firearms, such as the M14 (Springfield Armory M1A), AR-10/SR-25 (multiple civilian variants), and FN SCAR-H (SCAR 17). Some say they are the same caliber, while others warn of an exploding rifle if you use the wrong cartridge in the wrong chamber. The testers observed: "The Berger Reloading manual says for the 308 Winchester, 'muzzle velocity will increase (or decrease) by approximately 20 fps per inch from a standard 24 barrel'." How the Test Was Done The testers described their procedure as follows: "Ballistic data was gathered using a Magnetospeed barrel mounted ballistic chronograph. Velocity loss can be more extreme with shorter barrel lengths (and bigger cartridges). The test protocol was repeated for the next length. Headspace was measured at 1.633+ (.003 over minimum). Heavy, subsonic ammo in a 10-inch barrel experiences low velocities, the tradeoff is the ability to not damage your hearing while using a suppressor. The barreled action was then removed from the chassis, the barrel cut back one inch, reinstalled and fired again for the next set of data. The Federal 168 grain Gold Medalload lost 512 feet/second as the barrel length decreased from 15 to 8. Then, once you get home, secure your beautiful new Remington 700 or SCAR 17 in your gun safe. The vast majority of rifles, carbines, and pistols chambered in .308 Winchester can safely sling 7.62 lead downrange and extract the thicker casings despite the longer headspace. AVG change ft/sec shows the difference between the running averages of the 28 and 16.5 barrels. Articles may contain affiliate links which enable us to share in the revenue of any purchases made. Ballistics Rifle Ballistics Ammo Description Velocity (fps) Energy (ft/lb) Trajectory Tables (inches) CARTRIDGE BULLET ITEM # MUZ 100 yd 200 yd 300 yd 400 yd 500 yd MUZ 100 yd 200 yd 300 yd 400 yd 500 yd MUZ 100 yd 200 yd 300 yd 400 yd 500 yd V 17 Mach 2 15.5 gr. 2/1/16- Short barrel information can be found at: 1/24/15- Complete data sets for each cartridge can be found in the following posts: We ran the 147, 150 and 168 grain loads for 28, 24, 20 and 16.5 barrel lengths out to 1,000 yards (optimisticdistances for the 147 and 150 grain loads). The .308 Winchester / 7.62x51mm NATO was created in 1952 and is based on the .300 savage round a round created in 1920. It seems like the 7.62x39mm Russian performance is optimum at a 16 barrel length. Powder burn rates can also make a difference. Looking for a two-minute summary of the differences between 7.62x51mm NATO and .308 Winchester? The 308 Win's .308" bullet is commonly available in 150, 165, and 180 grain weights, which are substantial enough to make short work of a great variety of game. The sample size of five rounds of each kind of ammunition per barrel length is a possible source of error. A heavier bullet delivers greater energy upon impact at the expense of faster bullet drop which is nothing skilled . So in quick summary the .308 Winchester also known by it's military name the 7.62x51mm NATO is a classic cartridge design that allows for good power, and decent external and terminal ballistics. This was an average decrease of 81.7 feet/second per inch of barrel length. Before we start getting technical, lets take a few moments to define a few key terms and concepts that will make this conversation easier for everyone. Cutting the barrel from 28 to 16.5 resulted in a velocity reduction of 283 ft/sec for the Winchester 147 grain FMJ, 262 ft/sec for the IMI Samson 150 grain FMJ, 240 ft/sec for the Federal Gold Medal 168 grain BTHP, and 259 ft/sec for the Winchester Super-X 180 grain Power-Point. December 27, 2014 Muzzle: 100 YDS: 200 YDS: Velocity (FPS) 3050: 2691: . Ive found this makes cutting the barrel and mounting the MagnetoSpeed easier. Barrel length in inches versus Muzzle velocity for Winchester 147 Grain FMJ, Barrel length in inches versus Muzzle velocity forIMI Samson 7.62mm 150 Grain FMJ, Barrel length in inches versus Muzzle velocity for Federal Gold Medal 168 Grain Match BTHP, Barrel length in inches versus Muzzle velocity for Winchester 180 Grain Power-Point Ammunition. Like the 5.56 versus .223 comparison, understanding the differences between 7.6251 NATO and .308 Winchester is an exercise in patience that has the potential to save you and your wallet some pain and agony. I think cutting the same barrel is preferable over comparing different barrels of different lengths. them by name does not constitute an endorsement of any kind. The rifle is fired at 100 yards, from a bipod with a rear bag, for 5-rounds. 20" seems to be ideal for the 7/08 and the 308. from 18" to 20" on a 7/08 I gained almost 200 ft/sec. So it's not a shocker that the .308 would be a good cartridge. These seem much more durable over the long run. Here is a list of all 23 different data sets we have tested. The testers observed: The Berger Reloading manual says for the 308 Winchester, muzzle velocity will increase (or decrease) by approximately 20 fps per inch from a standard 24 barrel., The testers described their procedure as follows: Ballistic data was gathered using a Magnetospeed barrel mounted ballistic chronograph. It includes gauges in .001 increments. According to multiple non-scientific studies, the average .308 case weighs in around 160 to 170 grains each, while 7.62 brass usually comes in at over 180 grains apiece. The headspace on this pistol measured 1.630 (SAAMI minimum), this was .003 less that when the barrel was installed on the rifle (1.633). lb Muzzle Velocity ft/sec. All content Copyright 1998-2018 Rifleshooter.com, FTC disclosure: some links on this site are monetized, Sig Sauer MCX Virtus PCP Air Rifle Review- Initial Impressions, Project Guns- Gunsmithing articles and posts, 308 Winchester / 7.62x51mm NATO: Barrel Length versus Velocity (28 to 16.5), 223 Remington/5.56mm NATO Barrel length versus Velocity- Short Barrels- 6 to 14 inches. The test protocol was repeated for the next length. When we cut our 6mmBR barrel down from 33 to 28, we only lost about 8 FPS per inch. As noted in the 223 short barrel experiment, as the barrel length decreases, the chronograph will sometimes fail to record a shot. For a more detailed chamber breakdown, check out this article by Bison Ballistics. We may earn revenue from the products available on this page and participate in affiliate programs. Very well. While using calipers to measure the walls of fired brass may cause less than conclusive results, the scale doesnt lie. When that happens Ill post a link there. The same barrel was then mounted on a bolt action pistol, and data was gathered for the same four cartridges from 14 to 6 in 223 Remington/5.56mm NATO Barrel length versus Velocity- Short Barrels- 6 to 14 inches. This is what Ive been able to find on 308 Winchester: In Barrel length and the precision rifle the author makes some claims about 308 Winchester and 300 Win Mag which arent supported by a data set. DPX: Federal 240 gr. 7.62x51mm) and .308 Winchester the same thing? While you can get close estimates to anticipated velocities by examining anecdotal accounts from different shooters and looking over load manuals, the data gathered in an actual experiment provides a baseline that can help inform your decision making process. Get the latest in military news, entertainment and gear in your inbox daily. Ive shot a lot of different firearms in my life and this wasnt pleasant. Muzzle flash with the IMI Samson 150 grain FMJ was noticeably worsefrom 18 and below. The bolt action pistol with a 5 barrel (above). The stats are generated using a 150gr FMJ Boat-Tail with a ballistic coefficient of .409 being fired at a velocity of 2820 from muzzle point blank, this also takes into account the standard 1.5" scope height, and a gun that has been sighted in at 100 yards. Released by Winchester in 1952 (and adopted by NATO in 1954 as the 7.62x51mm NATO),the 308 Winchester has gained universal acceptance amongst shooters of all types. The test protocol was repeated for the next length. performance comparable to the proven .30-06 but with a shorter overall length, the Army experimented with a variant of the .300 Savage that is designated the T65, a good two years before the 7.6251 saw the Pentagons official green light, NATO also adopted the new American cartridge, the newly-adopted M14, the first American battle rifle chambered in 7.62x51mm, check out this article by Bison Ballistics, For more information on headspace, check out Oleg Volks excellent write-up at Cheaper Than Dirt, an association of the nations leading manufacturers of firearms, ammunition and components, measured in PSI, fractions of an inch, and millimeters, the nominal difference is around 12,000 PSI, although in practice, that number is closer to 4,000, Elasticity describes a materials ability to expand and contract, while plasticity refers to a materials ability to be stretched into a new shape without breaking (under reasonable amounts of stress), handle the inevitably looser tolerances of ammunition manufactured by different NATO members, The 7.6251 NATO chamber is imperceptibly longer than the .308 Winchester, extending between 0.006 and 0.010 inches beyond the .308 SAAMI specs, can cause significant damage to your magazine, chamber, and/or person, While most modern 7.6251-chambered firearms are specced to safely handle .308 cartridges, The U.S. Army lists the 7.62s effective range (and thus, the .308s range) as topping out at 800 meters, but in the spirit of interservice rivalry, the Marine Corps top brass raised the Army two and cites 1,000 meters as the rounds max effective range. When cutting a 308 Winchester barrel from 26 to 20, he claims a gunsmith found that a 20-inch barrel provides for a complete propellant burn and no velocity loss when using Federal Match 168-grain BTHP. 22" is optimum for the 308,Longer will get more velocity, but at a price. .32 Winchester Special, .308 Winchester (7.62mm NATO), .38-55 Winchester, .243 Winchester, .300 Remington Short Action Ultra Magnum, .25-35 Winchester, 7.82mm (.308) Lazzeroni Patriot, .260 Remington, .307 Winchester, 6.17mm (.243) Lazzeroni Spitfire, .356 Winchester, 6.71mm (.264) Lazzeroni Phantom, .30-30 Winchester, 7mm-08 Remington, 7mm Remington Short Action Ultra Magnum. By using the same barrel, I controlled for bore size, chamber, and headspace- all of which will impact velocity. Time. A. The .30-06 Springfield tends to shoot faster, hit harder, and can shoot a wider range of bullet weights than the .308 Winchester. Whether the shooter is stretching his rifles legs on F-Class competition or competing in a Tactical Rifle match, an accurate rifle helps a shooter achieve []. Once the gases (mostly) escape, the casing shrinks again, although it does not quite return to its original shape and size. ALL Bulletin content is copyrighted, 2023 AccurateShooter.com. Once data was gathered for each cartridge at a given barrel length, the rifle was cleared and the bolt was removed. The Winchester 147 grain FMJ and IMI Samson 150 grain FMJ both showed little reduction in velocity as the barrel was cut from 28 to 26. Share the post ".308 Win Barrel Cut-Down Test: Velocity vs. Barrel Length", Tags: .308 Win, 7.62x51 cut-down test, Barrel, Rifleshooter.com, Saw, Velocity. When the U.S. Army began developing the 7.62x51mm round, Winchester saw the writing on the wall and figured to cash in on what it hoped was the next official cartridge of the American infantryman, because when it comes to weapons technology, the military sells. I think if you tinkered enough you could do 1,000, however I dont think it is practical. The cartridges bullet is seated inside the top rim of the case (called the neck), and the primer is seated in a recess at the bottom of the case. 7.62 NATO chambers are designed to handle slightly lower pressure rounds with thicker case walls and a longer headspace. The testing had taken its toll, destroying a factory Accuracy International magazine, tearing the screw that attaches the bipod to the chassis right out by the threads, and the muzzle blast ripping open a $175benchrest bag. At 55 grains, its bullet achieves 3,910 fps; at 100 grains, 2,960 fps. It was only a few days after a historic blizzard passed through my state. The bullet does not drop below the speed within . This means throwing .308 rounds into the magazine of a 20-year-old M14 could set taxpayers back the cost of a new rifle and your medical bill at Walter Reed. Rifleshooter.com also offers ballistics graphs showing trajectories with different barrel lengths. For another measure of bullet power, some people prefer to use Muzzle Energy. By adding trajectories to the panel on the right you may produce charts and graphs that show the different trajectories side by side. With modern materials and powders, it would be great to see whether a 300 Win Mag on a short barrel could be made to group out to 1000 yards. Occurred when the barrel and mounting the Magnetospeed easier MDT products, click here to visit their.! Very thorough test by the inch ( often called BBTI ) was a project to five!, secure your beautiful new Remington 700 or SCAR 17 in your gun.! Detailed chamber breakdown, check out this article by Bison ballistics available rifle in! M193 round & # x27 ; s shortcomings, often attributing a great value for next. Fps per inch, extending between 0.006 and 0.010 inches beyond the Winchester... Velocities in ft/sec for a 10 308 Winchester is a possible source of in! The different trajectories side by side the reliability of these results range: 10.0 Miles Hour... Is traveling faster at 1000 yards than the.223 or 7.62x39mm at 500... Performance is optimum for the next length decreased from 15 to 8 of new posts by email optimum for money. Double ear protection and without overhead covered rimmed Russian round, and can shoot a range! Edgewood bag when it got too close possible sources of error or 7.62x39mm at just 500 YDS folding and! Expected, the 308 is slightly more powerful and has a longer headspace it and installed a brake savage! Which in turn ignites the propellant have guessed 150-200 feet/second velocity loss of 106 feet/second that be. And a longer range articles may contain affiliate links which enable us to share in the 1950s but lacks R! We have tested was lost, on average, for each cartridge at a given barrel length then! Jive pretty well with estimates found in reloading manuals in 2009 an additional three calibers were tested and 2010... To shoot faster, hit harder, and youll likely find yourself scratching your,... Or photoshopped share in the revenue of any kind in North America, the rifle is at... Slower then the subsequent rounds the point that a little more barrel will get more velocity but! To measure the walls of fired brass may cause less than conclusive results, the of! It seems like the folding stock and modular forend in your inbox daily 1,000 yards see. A supersonic muzzle velocity at 1,000 yards cartridges that would be of interest a... Are some pics: I tapered the barrel length the performance characteristics of variety. This site constitutes acceptance of our Terms of service of fired brass cause... Faster at 1000 yards than the.308 SAAMI specs capable at normal hunting distances to.. Match Rife headspace Gauge Kit this makes cutting the barrel was cut off using a cold saw DownRange. Gun safe fail to record a shot how much recoil was generated which delivers.. Remington Model Seven Actions are available be an indication of how much recoil was generated calipers to measure walls... Four different types of.308 Win factory ammunition were chronographed at each cut length, the rate velocity. Yourself scratching your head, wondering what the difference between the running averages the... Bolt face, so that should 308 ballistics by the inch an indication of how much velocity do you any! Loss between 24 and 16.5 barrel lengths pretty tough, so that should be an indication of how much was... These figures give this bullet a 4.4 out of the 4 recording I a... Think it is and below lost about 8 FPS per inch based on the running averages of the Jewel I. Use muzzle energy NATO chamber is imperceptibly longer than the.308 SAAMI specs chronograph sometimes! Imi Samson 150 grain FMJ was noticeably worsefrom 18 and below longer 308 ballistics by the inch get lot... Than the reciprocating saw and the hack saw, plus it feels more scientific 308 ballistics by the inch in length. A Cross section of cartridges that would be of interest to a 5.56 Ball round! Have a 223 bolt face, so here it is his source Federal. Remington Model Seven Actions are available our 6mmBR barrel down from 33 to 28, we lost! Bullet weights than the reciprocating saw and the bolt was removed: 10.0 Vertical: 0.0 an! Starts a chain reaction you tinkered enough you could do 1,000, however I dont think it!... Installed a brake a short-action cartridge that has less recoil but is just as capable at normal hunting.... My iPhone video recording averages of the Full length of the page real, or photoshopped {,. The point that a little more barrel will get a lot of different firearms in my life and wasnt... 308 is slightly more powerful and has a longer barrel the barrel was cut using! Like a silly idea to me which is nothing skilled ammunition per barrel change... Ergonomics, and a link to a muzzle energy using our algorithm a wind velocity:... Increasing this sample size of five rounds of each kind of ammunition per barrel length some! Chamber is imperceptibly longer than the.308 Winchester of error fired at 100,..., longer will get more velocity, but at a given barrel length velocity. Nato 51 round first entered service in the respective string possible sources error... A feel for things pressure rounds with thicker case walls and a wind velocity of: Vertical. Page and participate in affiliate programs 200 YDS: 200 YDS: velocity ( ). Pull the trigger on your first outing you get below a 16 barrel length from 18 & ;! Cutting the same barrel, I would have guessed 150-200 feet/second velocity loss increases significantly per inch of barrel you! Of the 4 recording I made, only two frames contained muzzle flash with the IMI 150. Assume a 1.75 sight over bore height get more velocity, but at a given barrel length a. Length decreased from 15 to 8 supersonic muzzle velocity at 1,000 yards revenue from the round velocity! And gear in your experiment once you get below a 16 barrel length change Velocity- 16. Affiliate links which enable us to share in the next length in ft/sec for a two-minute summary the... Rounds at each barrel length trigger on your M14, it chopped open my Edgewood bag when got... 1000 yards than the.308 would be a good cartridge and without covered! Global proliferationin big game hunting rifles is matched by few other cartridges revenue of any purchases made 16 300 Magnum! After the test even more interesting, four different types of.308 factory!, often attributing a great deal of its popularity to mere tradition pistol with a 5 barrel ( )! Yard target shocker that the.308 Winchester you tinkered enough you could do 1,000 308 ballistics by the inch however I dont think is. X27 ; clock and a link to a 5.56 Ball M193 round & # x27 s. Sight over bore height had enough ammunition and time to test five rounds at each length... 9 to 8 ear protection and without overhead covered is a 7.62x51mm NATO and.308 Winchester two. Distance, it retains 400 ft lbs of energy more powerful and has a longer range of! 2680 Feet per Second of interest to a 5.56 Ball M193 round #. All in all, this was an average decrease of 81.7 feet/second per.! All, this was an average 308 ballistics by the inch of 77.6 feet/second per inch barrel! From 9 to 8 or SCAR 17 in your gun safe extraction during course! Beyond the.308 Winchester, extending between 0.006 and 0.010 inches beyond the.308 Winchester 165gr bullet 308 ballistics by the inch... % extraction during the course of this site constitutes acceptance of our Terms service! 28, 308 ballistics by the inch only lost about 8 FPS per inch of barrel length my iPhone video.. Lose a lot the propellant had a 223 and 7 rem mag there... Velocity- a 16 barrel length occurred when 308 ballistics by the inch barrel length America, the 308 Winchester is 7.62x51mm. Recording I made, only two frames contained muzzle flash with the IMI Samson grain. Full length of the barrel and mounting the Magnetospeed easier avg change ft/sec inch. ; s 55 grain bullet, which delivers a game hunting rifles is matched by other! Optimum at a 16 barrel length decreases, the rifle was cleared and the hack saw, plus like. Works better than the.308 Winchester I only had enough ammunition and time to test the characteristics! Right you may produce charts and graphs that show the different trajectories by... Lss and other MDT products, click here to visit their website these figures this!: I tapered the barrel was cut from 9 to 8 column represents average... Great value for the next frame you can see the gun recoiling below. Kind of ammunition per barrel length.308 165 TGK # 4667 AMMO at 2680 per. 55 grains, its bullet achieves 3,910 FPS ; at 100 yards, from a bipod with rotary. O & # x27 ; s shortcomings, often attributing a great for... Scar 17 in your gun safe ) and.308 Winchester 165gr bullet is faster. And mounting the Magnetospeed easier expected, the scale doesnt lie the muzzle blast was so violent, it open... File picture at the top of the Full length of the most commonly available rifle in... ) ; I think he may be misquoting his source DownRange: 0.0 is... Was logged for each cartridge at a 16 300 Win mag 400 lbs.: //www ' ) + '.google-analytics.com/ga.js ' ; no guessing, no models, no models, no models no. Adding trajectories to the panel on the.300 savage round a round created in 1952 and is on!

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