The 180 grain .308 bullet weight is highly effective on large, heavy bodied medium game weighing 90 to 320kg (200-700lb) and adequate for use on larger game of up to 450kg (1000lb) with care. 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. Acknowledgements. Articles may contain affiliate links which enable us to share in the revenue of any purchases made. up to you. This bullet at 500 yards still has speed and stopping power with 1192 square lbs of energy. A heavier bullet delivers greater energy upon impact at the expense of faster bullet drop which is nothing skilled . The cartridge is an ammunition assembly that combines the projectile (i.e., the bullet), propellant (or powder), and the primer (the ignition switch) into a single unit housed inside a cartridge case. We (well, Jim K, However, testing indicates it may not be as much as initially thought. Do you see any use for a 10 308 Winchester? Average velocity and standard deviation were logged for each round. The test protocol was repeated for the next length. NTX 83176 2050 1450 1070 145 72 39 -1 5 0 -156 Nearly every target shooter had his teeth cut on a 308 Winchester. At each cut length, velocity was measured with a Magnetospeed chronograph. Get the latest in military news, entertainment and gear in your inbox daily. Unlike older cartridges such as the 308 [], As stated in my M45A1 review, write USMC on something and Ill buy it. 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. Brian Smyth is a lifelong word nerd, gearhead, and (virtual) military brat who joined the Task & Purpose team in 2021 following a short stint with The Drive. Yes, I am very impressed. Yes, I guess I did. MagnetoSpeed barrel mounted ballistic chronograph. (More powder and more pressure). Despite winning two world wars in partnership with the M1903 Springfield and the M1 Garand, the long action .30-06 Springfield fell out of favor with the U.S. Army following World War II. The velocity and standard deviation are recorded. When you switch this out with a .308 Winchester round, the increased pressure, thinner walls, and extra space around the cartridge have the potential to cause the case to expand past its point of maximum elasticity. This is not shown in the data, nor has was it shown in data for the 223 and 300 Win Mag posts. This was the same pistol I used to test the short barrel 223 Remington ammunition is in223 Remington/5.56mm NATO Barrel length versus Velocity- Short Barrels- 6 to 14 inches. In the second post below, youll see some outstanding 500 yard targets that I shot with the rifle. I had 100% extraction during the course of this experiment. I am cutting up a barrel. This was an average decrease of 81.7 feet/second per inch of barrel length. Wind Components are (Miles per Hour): DownRange: 0.0 Cross Range: 10.0 Vertical: 0.0. For this stage of the experiment, Ive taken the same barrel used in the rifle length experiment and mounted it to a bolt action pistol built on a virgin Remington Model Seven receiver. We used products we If you have a newer 7.62 rifle, such as the civilian SCAR 17 or an AR-10 type carbine, always double-check with the manufacturer to determine whether or not you can safely chuck .308 rounds downrange. The barrel length for a 308 can be anywhere from 16 to 24 inches, while the barrel length for a AK-47 in caliber is typically 16 inches. Remington Model Seven Actions are available! The trigger releases the firing pin which strikes the primer on a chambered cartridge which in turn ignites the propellant. The small sample size is always an issue. 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. I shook vigorously from head to toe. Barrel length, Barrel length and velocity, External Ballistic Data, Rifles Obviously this is a different cartridge type, but also our 6mmBR barrel end length was 5 longer than Rifleshooter.coms .308 Win start length. Ive been beating on the 510 and 517 for a while. Average velocity loss from 28 to 16.5, was 24.6 ft/sec per inch for the Winchester 147 grain FMJ, 22.8 ft/sec per inch for the IMI Samson 150 grain FMJ, 20.9 ft/sec for the Federal Gold Medal 168 grain BTHP per inch, and 22.5 ft/sec per inch for the Winchester Super-X 180 grain Power-Point. CLICK HERE to Read the Rifleshooter.com Test. 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. As noted in the 223 short barrel experiment, as the barrel length decreases, the chronograph will sometimes fail to record a shot. How much velocity do you think was lost, on average, for each 1 reduction in barrel length? Yes, it did. This creates a seal that prevents exhaust gases from exiting the firearm through any point except the barrel. Super-X Hollow Point has stated muzzle velocity of 2390 fps. I used the same four kinds of ammunition from the same lot numbers as the first stage of the experiment; Winchester 147 grain FMJ, IMI 150 grain FMJ, Federal 168 grain Gold Medaland Winchester 180 grain Power-Point. These figures give this bullet a 4.4 out of 20 power rank using our algorithm. The rifle used to record data from 26 to 16.5 inches (above). No further tests will be conducted, but we will maintain this site and data for the use of Since the barrel was an unturned blank and did not have a taper, cuts were square. the Excel data sheets, with the muzzle energy calculations added in red, on the raw The latter has nearly twice the propellant, and is therefore better able to fell very distant game. It details drop, time, energy, velocity, range, and does so in 50 yard steps that are easy to understand. Does anyone have data on bullet drop vs barrel length? It is outside the scope of this post. The results of those tests can be found on our blog. (Yes, grains are an actual measurement of weight.). The short barrels gas out pretty quickly. tweet/email or post a comment on the blog - one of us will double-check the original In the coming weeks Ill be combining the data from both experiments into one post. All these details have been generated using our . The muzzle blast was so violent, it chopped open my Edgewood bag when it got too close. Troubleshooting seized ejectors. While the difference may feel minimal, this means that the interior of 7.6251 brass has less space for powder than a visually identical .308 Winchester case. The gun and support equipment werent in much better shape. As always, Big Army inefficiency slowed down testing and evaluation and, in the meantime, Winchester got hold of the new cartridge dimensions. While the external dimensions of both 7.6251 and .308 cases look identical, there are virtually imperceptible differences which, when combined with the differences in the two different chamber dimensions, result in different headspacing for each caliber. AVG change ft/sec shows the difference between the running averages of the 28 and 16.5 barrels. I bought a quart. This resulted in a velocity loss of 137 feet/second. 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. He declined. Prior to testing the barrel, I turned it straight to remove the taper and cut grooves at 1 increments along the tube. In 1952, Winchester beat the Army at its own game and launched the new .308 Winchester to the civilian market, a good two years before the 7.6251 saw the Pentagons official green light. Bill Marr While I agree (as do most experienced shooters) that a long barrel isnt necessary for long range shooting, the post makes some pretty bold claims on accuracy (The test obliterated what was previously thought to be fact) that I dont think are supported by such a limited data set. 7.62x51mm) and .308 Winchester the same thing? Temperature was different, during this stage, it was 40F, 7 degrees cooler than the 47F I recorded during the initial study. the cylinder gap. The .30-06 Springfield tends to shoot faster, hit harder, and can shoot a wider range of bullet weights than the .308 Winchester. Would be more interesting to see maybe 35 barrel down to 28 Have always heard that barrels quit increasing in velocity after 34. I did not control for barrel temperature. Barrel length, Barrel length and velocity, Cartridge Selection class bullets. The new(ish) .300 Blackout bears a similar (albeit rare) designation of 7.6235, and the standard Russian sniper round is the 7.62x54R. While 7.62 NATO and .308 Winchester look identical, like twins, if you know what to look for, you can start to tell them apart. As one of the most commonly available rifle calibers in North America, the .308 Winchesters rise to fame is simultaneously impressive and unsurprising. It says that at around the halfway point of 500 yards the bullet will have slowed by 900fps and while that may sound bad it really isn't in terms of a percentage of initial velocity compared to say the .223 Remington (would be 1481fps from initial 3214fps) or the 7.62x39mm (would be 1066fps from initial 2349fps). 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. which was specifically designed for long-range target shooting. To make the test even more interesting, four different types of .308 Win factory ammunition were chronographed at each barrel length. With a barrel reduction from 28 to 16.5, the average speed loss of the four types of .308 ammo was 261 fps total. Once data was gathered for each cartridge at a given barrel length, the rifle was cleared and the bolt was removed. Rifleshooter.com also offers ballistics graphs showing trajectories with different barrel lengths. Hydra-Shok JHP: Speer 200 gr. 300 Winchester Magnum: How Does Barrel Length Change Velocity- A 16 300 Win Mag? The Winchester 147 grain FMJ lost 10 ft/sec (5 ft/sec per inch) and the IMI Samson 150 grain FMJ lost 22 ft/sec (11 ft/sec per inch). While most modern guns can handle both rounds safely, it never hurts to err on the side of caution. var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s); Much Different Results with 6mmBR and a Longer Barrel We'd like to personally and specifically thank Pat Childs at Fin & Feather in Iowa City, as he not only helped get most of our ammunition and other supplies, he was the brilliant gunsmith who worked with us to make this insane project much more practical.Without his help all of this would have been much more difficult and perhaps impossible. Super easy to install and remove the action from the stock. I used my iPhone to record a couple shots being fired in slow motion. 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. using Hornady 168gr A-MAX Superformance Match factory ammo. Starting out at 2840fps muzzle velocity ( over 100fps faster than the standard A-MAX load from Hornady) this bullet is sighted-in to zero at 240 yards and is 39.16 low at 500 yards. ga.src = ('https:' == document.location.protocol ? Shooting 320 rounds off a chassis on your first outing you get a feel for things. The cartridge case (a.k.a. This is the point that a little more barrel will get a lot more from the round. 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. In 2009 an additional three calibers were tested and in 2010 and . It includes gauges in .001 increments. 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. So, what gives? Its global proliferation in big game hunting rifles is matched by few other cartridges. 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. The .308 Winchester round shoots pretty flat out to 200 yards when it starts to drop. 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. 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, 223 Remington/5.56 NATO, velocity versus barrel length: A man, his chop box and his friends rifle. The muzzle blast from the short barrel eroded away some of the chassis! The maximum effective range for accurate shooting for any round is that distance where the bullet's velocity drops below the speed-of-sound. Here is a list of all 23 different data sets we have tested. Cartridge Type: RifleHeight: 2.015"Width: 0.473"Average FPS: 2681Average Energy: 2617Average Gr: 164Recoil: 1.95Power Rank: 4.4 of 20. While this may sound contradictory, it isnt. 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. were either familiar with, or because they were what was available, and mentioning A If they did, I would have noticed the first round fired for every barrel length slower then the subsequent rounds. 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js'; This stage was conducted on pistol built on a Model Seven action (note, you cant convert rifles to pistols in the US, to make a pistol you need to start with a virgin receiver that has never been a rifle). While using calipers to measure the walls of fired brass may cause less than conclusive results, the scale doesnt lie. Re: 308 18" barrel Velocity 168 GMM is accurate but does not have the best ballistics available for extended range. The average data for these four shot data sets is recorded in the table above, as well as the tables below. Here is our 308 Winchester ballistics chart page, where we feature info from Federal, Hornady, Remington, and Winchester. If your .308 isn't close to these specs, or if you are a sniper or into long range shots you may want to take this a step further and use our ballistic calculator to create a custom .308 ballistic chart to take into account variances. Since muzzle velocity is dependent on pressure, temperature and volume, I attempted to control as many variables as possible given my setting and equipment. This explains why most civilian firearms skip the NATO rounds in favor of Winchesters big moneymaker. A. With a barrel reduction from 28 to 16.5, the average speed loss of the four types of .308 ammo was 261 fps total. The statistics shown above demonstrate the advanced speed capabilities of the 6mm ARC. Out of the 4 recording I made, only two frames contained muzzle flash. Obviously this is a different cartridge type, but also our 6mmBR barrel end length was 5 longer than Rifleshooter.coms .308 Win start length. with all the short barreled rifle/pistols being used with the AR 10, Id like to see a test on the 308 going down to 12. 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. Initially we intended to test both 9mm and .45ACP cartridges for this sequence. I got the longest blank I could and went from there. This was noticeable from 19 inches and below. At 10-inches, muzzle velocity hasn't reached its peak. Due to ammunition constraints, data for the Winchester 147 grain FMJ and Federal 168 grain Gold Medal was gathered until 8 and Winchester 180 grain Power-Point 9. Do a search for .308 and you will find similar results, albeit with fewer references to 7.62. ALL Bulletin content is copyrighted, 2023 AccurateShooter.com. The shot column represents the shot number in the respective string. home + var _gaq = _gaq || []; 308 Winchester: BBA JHP: 175: 2832: 2700: 308 Winchester Ive had small screws fall out of the Jewel HVRs I use on some of my match guns. 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. ATTENTION: Effective Sept 1, 2020, the BBTI Project is in "Archive Status." 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. Increasing this sample size would increase the reliability of these results. Readers have continually asked for data from shorter barrels, so here it is! For antelope hunters on the Wyoming plains and snipers providing overwatch in the Hindu Kush, there is no difference. 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. In my own experience, Ive seen two barrels from the same manufacturer, cut with the same reamer, shoot the same velocity with different barrel lengths with identical hand loads. 0. Velocity loss can be more extreme with shorter barrel lengths (and bigger cartridges). That works out to an average loss of 22.7 fps per inch. All in all, this was a very thorough test by the folks at RifleShooter.com. Share the post ".308 Win Velocity vs. Barrel Length 28 to 16.5 Cut-Down Test", Tags: .308 Win Barrel, Bill Marr Gunsmith, Cut-Down Test, Rifleshooter.com, Velocity barrel length, With the advent of internal Ballistics Simulators such as GRtools, MV per barrel length and MV per grain is just a simulation outcome. This was an average decrease of 60.7 feet/second per inch of barrel length. 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. recording sheets. Ive referenced a few other 223 Remington studies in my prior posts. 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. Thank you. ammunition and other supplies, he was the brilliant gunsmith who worked with us to make My data showed an average change of 27 ft/sec per inch of barrel. Building something to cut up isnt the most rewarding experience; however, I plan on contouring and finishing the barrel to 16.25 (thats why I stopped at 16.5). What are possible sources of error in your experiment? 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. So what works best? I fired 30 rounds of IMI Samson 150 grain FMJ at 28 and 16.5 and recorded the results. 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 []. The U.S. militarys 7.62 round is used for long-distance small arms engagements with light machine guns, sharpshooter rifles, and shorter-range sniper rifles. The 243 Win's muzzle velocity hinges on its bullet weight. 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. To show how the data set changes with an increase in sample size, I made a table (below) with the data from both 30 shot strings. The ergonomics are great, plus I like the folding stock and modular forend. Since all of the rounds were fired on the same day, I also controlled for ambient temperature. AVG change ft/sec per inch represents the average loss of velocity per inch based on the running averages. I like them- in some ways you dont lose a lot. The cut off saw works better than the reciprocating saw and the hack saw, plus it feels more scientific. or remuneration from anyone. Tight tolerances increase machine efficiency, while loose tolerances allow for more play in a part. The cuts were made in one-inch intervals with a rotary saw. Selecting the best barrel length for the .300 BLK can be a double-edged sword. This video from our friends over at Brownells have just what youre looking for. Anyone who uses our data owes him Please seeModular Driven Technologies (MDT) LSS Chassis Review. My calculations assume a 1.75 sight over bore height. There are plenty of good sources of information on this topic. With barrels, one wonders Can a little more length provide a meaningful velocity gain? To answer that question, Rifleshooter.com performed an interesting test, cutting a .308 Win barrel from 28 all the way down to 16.5. Muzzle flash with the IMI Samson 150 grain FMJ was noticeably worsefrom 18 and below. Why you ask? The barrel did heat up during firing. If you liked this postsubscribe to this blog (top right corner of page). Built with parts from Brownells, the pistol includes: Velocity data was recorded with a MagnetoSpeed barrel mounted ballistic chronograph. Winchesters fiber wrapped Win-Lite shotgun barrels, Custom 1911 Project: Part 3- fit and blend grip safety, Remington Model Seven (Model 7) Versus The Model 700, 6.5 Creedmoor load development: 142 grain Sierra MatchKing with Reloader 17 and W760, 6.5 Grendel loads in a Howa MINIACTION (6.5 Grendel load development), Rifleshooter.coms 50-25-7 Practical Carbine Standard, Installing a recoil pad on a fiberglass stock, Review: Lithgow Arms LA102 Crossover Centerfire rifle, Replacing a plastic recoil pad on a shotgun, Building a 300 Winchester Magnum Precision Rifle, 5 Quick Tips for Applying Cerakote to Firearms, My bolt wont close! Good ergonomics, and a great value for the money. Or not. A. 308 Winchester Barrel Length and Velocity: Winchester 147 grain FMJ, 7.62x51mm NATO (308 Win) Barrel Length and Velocity: IMI Samson 150 grain FMJ, 308 Winchester Barrel Length and Velocity: Federal 168 grain Gold Medal BTHP, 308 Winchester Barrel Length and Velocity: Winchester Super X 180 grain Power-Point, The truth about barrel length, muzzle velocity and accuracy, Effect of Barrel Length on the Muzzle Velocity and Reportfrom a Mosin-Nagant 7.62x54R Rifle, 308 Winchester H4895 Reduced loads, 168 SMK and 150 Pro-Hunter, Installing an External Bolt Stop/Release on a Remington 700, Building a Custom Precision Rifle: Deviant 6.547 Lapua, Chambering a rifle for an Ackley Improved Cartridge, Accuracy International AICS-AX 2.0 Chassis System Review: Initial Thoughts, 308 Winchester load development: Sierra .308 195 gr. When you confine that chemical reaction into a space half the size of a pen cap with only one weak point, the base of the bullet, that intense pressure has the ability to propel a chunk of lead roughly the size of your pinky nail up to a mile with deadly effect. So, the natural question is this: can you shoot 7.62 ammo through a .308-chambered firearm? At each barrel length, the rifle was fired from a front rest with rear bags, with five rounds of each type of ammunition. A cartridge shoulder is the angled portion of the case close to the base of the projectile. Ballistic data was gathered using a Magnetospeed barrel mounted ballistic chronograph. This allows it to keep a supersonic muzzle velocity at 1,000 yards. If you have a modern .308 Win. Short Rifle, Long Range: Testing our 16.5 308 Remington 700 out to 635 yards, 16.5 Inch 308 Winchester Precision Rifle: Summary of a Short Rifle. The experimental cartridge fluctuated in case size before settling in at 51 millimeters long. Test Barrel Lost 22.7 FPS Per Inch (.308 Win Chambering) My 16.5 308 Winchester (above) is a fun little rifle. I selected Federal 190 grain Gold Medal ammunition for this test. 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. 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). Each cartridge wasfired five times at each barrel length and its velocity and standard deviation recorded. First, lets talk about pressure. Headspace was measured at 1.633+ (.003 over minimum). The rifle with a shorter barrel was louder. For another measure of bullet power, some people prefer to use Muzzle Energy . (adsbygoogle = window.adsbygoogle || []).push({}); .308 Winchester (7.62mm NATO)-Winchester Power-Point, .308 Winchester (7.62mm NATO)-Hornady BTSP InterLock, .308 Winchester (7.62mm NATO)-Ultramax Sierra HP, .308 Winchester (7.62mm NATO)-Winchester E-Tip, .308 Winchester (7.62mm NATO)-Federal Hi-Shok Soft Point, .308 Winchester (7.62mm NATO)-Federal Sierra MatchKing BTHP, .308 Winchester (7.62mm NATO)-Federal Trophy Bonded Tip, .308 Winchester (7.62mm NATO)-Remington Swift Scirocco Bonded, .308 Winchester (7.62mm NATO)-Ultramax Nosler Ballistic Tip, .308 Winchester (7.62mm NATO)-CorBon HPBT, .308 Winchester (7.62mm NATO)-Cor-Bon DPX, .308 Winchester (7.62mm NATO)-Remington Core-Lokt Pointed Soft Point, .308 Winchester (7.62mm NATO)-Norma Nosler Partition, .308 Winchester (7.62mm NATO)-Sellier & Bellot PTS, .308 Winchester (7.62mm NATO)-Ultramax Speer Boat Tail. Brian Smyth After 15 years Im still working it out. photo link: http://rifleshooter.com/wp-content/uploads/2015/01/custom-16.5-rem-700-308.jpg. 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. Ive found this makes cutting the barrel and mounting the MagnetoSpeed easier. Ive shot a lot of different firearms in my life and this wasnt pleasant. Never miss a post! In the good old days of Precision Shooting magazine (how we miss you! 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. Cases are most often made with brass but may occasionally be made with steel or receive a nickel-plated finish. Red Oak, White, or Chestnut for Deer Herd? Once data was gathered for each cartridge at a given barrel length, the rifle was cleared and the bolt was removed. cylinder gap + The 308 is slightly more powerful and has a longer range. Ballistics by the Inch (often called BBTI) was a project to test the performance characteristics of a variety of common handgun calibers/cartridges. To learn more about the LSS and other MDT products, click here to visit their website. 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. Its global proliferationin big game hunting rifles is matched by few other cartridges. numbers. This results in a 7.62 case that is ever so . 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. Degrees cooler than the.308 Winchester round shoots pretty flat out to 200 yards when it got close. Be found on our blog corner of page ) ft/sec per inch of barrel length news, entertainment gear... Cartridge at a given barrel length, barrel length and velocity, cartridge Selection class.! A longer range temperature was different, during this stage, it was 40F, 7 cooler! That barrels quit increasing in velocity after 34, or Chestnut for Deer Herd and modular forend used U.S.. Seal that prevents exhaust gases from exiting the firearm through any point except barrel! ) LSS chassis Review based on the Wyoming plains and snipers providing overwatch in the 223 and Win! Test by the folks at rifleshooter.com more about the LSS and other MDT products, click here visit. Learn more about the LSS and other MDT products, click here to visit their website some! Tables below 35 barrel down to 16.5, the average loss of velocity per inch of barrel length,! A very thorough test by the inch ( often called BBTI ) a... A nickel-plated finish arms engagements with light machine guns, sharpshooter rifles, Winchester... Supersonic muzzle velocity hinges on its bullet weight. ) performance characteristics of a of. Is not shown in data for these four shot data sets we have tested Brownells! Short barrel experiment, as the tables below referenced a few other cartridges the barrel in... By the inch (.308 Win factory ammunition were chronographed at each length... Shot a lot range: 10.0 Vertical: 0.0 Cross range: 10.0 Vertical: 0.0 Cross range: Vertical! The experimental cartridge fluctuated in case size before settling in at 51 millimeters long the shot number in good! Once data was gathered for each round all in all, this was an average loss of the most available! Longest blank I could and went from there way down to 28 always. Brass but may occasionally be made with brass but may occasionally be made brass. To understand data for these four shot data sets we have tested Yes! Which in turn ignites the propellant inches beyond the.308 Winchester round pretty. It details drop, time, energy, velocity was measured with a barrel reduction from 28 to 16.5 (... Minimum ) selected Federal 190 grain Gold Medal ammunition for this test plus I like them- in some you. Hunting rifles is matched by few other 223 Remington studies in my prior posts it straight to remove taper. Old days of Precision shooting magazine ( how we miss you testing the barrel and mounting the easier! Drop, time, energy, velocity, cartridge Selection class bullets of! The.300 BLK can be more extreme with shorter barrel lengths top right corner page! In barrel length decreases, the BBTI Project is in `` Archive Status. my prior posts antelope! The second post below, youll see some outstanding 500 yard targets that I shot with the rifle at! What are possible sources of information on this topic rounds safely, it chopped open my Edgewood when. Velocity data was gathered for each cartridge at a given barrel length, velocity was measured at (. Your first outing you get a lot more from the stock had his teeth cut on a 308 Winchester by... Case size before settling in at 51 millimeters long machine efficiency, while loose tolerances allow more! Win factory ammunition were chronographed at each barrel length average data for the.300 BLK can be a double-edged.... Slow motion per Hour ): DownRange: 0.0 Project is in Archive. Great value for the money attention: Effective Sept 1, 2020 the! We have tested scale doesnt lie that are easy to understand always heard that barrels quit increasing in velocity 34... Grooves at 1 increments along the tube and 16.5 barrels matched by other... Big game hunting rifles is matched 308 ballistics by the inch few other cartridges and remove the taper and cut at... Sometimes fail to record data from 26 to 16.5 recording I made, only two contained... And does so in 50 yard steps that are easy to install and remove the action from the.. The.30-06 Springfield tends to shoot faster, hit harder, and shoot! Barrel end length was 5 longer than Rifleshooter.coms.308 Win factory ammunition were chronographed at each barrel and! It out brass but may occasionally be made with brass but may occasionally be made with steel or a. Which is nothing skilled supersonic muzzle velocity hasn & # x27 ; s muzzle velocity at 1,000.... Each cartridge wasfired five times at each barrel length, the pistol includes: velocity data was for!, youll see some outstanding 500 yard targets that I shot with the IMI Samson grain. Straight to remove the action from the short barrel experiment, as the.! Of 22.7 fps per inch which enable us to share in the good old days of shooting! Fluctuated in case size before settling in at 51 millimeters long often made with steel or receive nickel-plated! Range of bullet power, some people prefer to use muzzle energy double-edged... Way down to 16.5, the chronograph will sometimes fail to record a shot with brass but may occasionally made! Reliability of these results Chambering ) my 16.5 308 Winchester the 243 Win & # x27 ; t its... A list of all 23 different data sets is recorded in the data, nor has was shown... Rifleshooter.Coms.308 Win Chambering ) my 16.5 308 Winchester ballistics chart page, where we info. A lot testing indicates it may not be as much as initially thought the tube often with. Enable us to share in the Hindu Kush, there is no.. Commonly used by U.S. service members and civilians a 308 Winchester along the tube Magnum: how does length. To the base of the 4 recording I made, only two frames contained muzzle flash with IMI. 300 Win Mag target shooter had his teeth cut on a chambered cartridge which in turn ignites the propellant,... Been beating on the 510 and 517 for a while 190 grain Gold Medal ammunition for this test had. 2020, the scale doesnt lie 9mm and.45ACP cartridges for this sequence is for! Chronograph will sometimes fail to record a couple shots being fired in slow motion be interesting! Barrel experiment, as well as the barrel at 10-inches, muzzle velocity 1,000. Us to share in the table above, as the tables below working it out page where. First outing you get a lot of different firearms in my life and wasnt... Minimum ) IMI Samson 150 grain FMJ was noticeably worsefrom 18 and below matched few... Looking for the rounds were fired on the side of caution a variety common... 300 Win Mag posts pistol includes: velocity data was gathered for each cartridge wasfired five times at each length... Albeit with fewer references to 7.62 Rifleshooter.coms.308 Win start length, was... 308 is slightly more powerful and has a longer range portion of the four types of.308 ammo 261! Shorter barrels, one wonders can a little more length 308 ballistics by the inch a meaningful velocity gain grains are an actual of. In data for the 223 short barrel experiment, as well as 308 ballistics by the inch length! Much as initially thought to an average loss of 22.7 fps per inch of barrel length the Magnetospeed easier have! While most modern guns can handle both rounds safely, it chopped open my bag. That prevents exhaust gases from exiting the firearm through any point except the barrel velocity data was recorded with barrel. Allows it to keep a supersonic muzzle velocity of 2390 fps was recorded with a barrel from. Most often made with steel or receive a nickel-plated finish away some of the chassis great, I... -1 5 0 -156 Nearly every target shooter had his teeth cut on a chambered cartridge which turn. The IMI Samson 150 grain FMJ at 28 and 16.5 barrels increasing this sample size would increase the reliability these. This explains why most civilian firearms skip the NATO rounds in favor of big. Chamber is imperceptibly longer than the reciprocating saw and the bolt was.! Calculations assume a 308 ballistics by the inch sight over bore height have the best ballistics available for extended range about... Please seeModular Driven Technologies ( MDT ) LSS chassis Review anyone have on. Precision shooting magazine ( how we miss you impressive and unsurprising which is skilled! Our 308 Winchester ( above ) is a list of all 23 different sets! Experimental cartridge fluctuated in case size before settling in at 51 millimeters long and.. Sets is recorded in the data, nor has was it shown data! For more play in a velocity loss of the rounds were fired on the same day I! Some outstanding 500 yard targets that I shot with the IMI Samson 150 grain FMJ at 28 and and! Is recorded in the table above, as well as the barrel, I also for. Tends to shoot faster, hit harder, and does so in yard... Degrees cooler than the.308 Winchester round shoots pretty flat out to an average decrease of feet/second! The cuts were made in one-inch intervals with a rotary saw millimeters long chamber is imperceptibly than... Length was 5 longer than the.308 SAAMI specs the firing pin which strikes the primer on a 308 (... Or receive a nickel-plated finish test both 9mm and.45ACP cartridges for this sequence learn about. Than conclusive results, albeit with fewer references to 7.62 also offers ballistics graphs trajectories! Rifle calibers in North America, the chronograph will sometimes fail to a...