308 ballistics by the inch

Headspace is the distance between the base of a case and the portion of the case that locks the entire cartridge into place within the chamber. This was an average decrease of 81.7 feet/second per inch of barrel length. 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This is a very useful test is youre thinking about building a .308 Win hunting rifle, or perhaps thinking of going shorter for your F-TR rifle to save weight. What do you think of the MDT LSS chassis? Headspace was measured at 1.633+ (.003 over minimum). The test protocol was repeated for the next length. When combined with properly specced ammunition, it seats the bullet in the proper position to begin its travel down the barrel. Test Barrel Lost 22.7 FPS Per Inch (.308 Win Chambering) Red Oak, White, or Chestnut for Deer Herd? The Federal 168 grain Gold Medalload lost 512 feet/second as the barrel length decreased from 15 to 8. Temperature was 47 F.. Did it really hurt to shoot a short 308 pistol? 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 A 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. I post it here, for free, so other shooters can learn from it. 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. Click on each to just browse the charts, click on a given ammunition type listed in the header of each chart for a graph of how that particular ammunition performed, or you can download the raw data for your own use. The short barrels gas out pretty quickly. 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. This could have some potentially expensive consequences. 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. site designed and maintained by Coeurbois Graphic Design. You may not reproduce original text or photos without advanced permission in writing. Ive found this makes cutting the barrel and mounting the MagnetoSpeed easier. 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. 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. up to you. 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). | Cases are most often made with brass but may occasionally be made with steel or receive a nickel-plated finish. Here are a few pictures [], Without a doubt, the crown of a rifle is essential foraccuracy. 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. By ammo type, the average loss per inch was: 24.6 (Win 147 FMJ), 22.8 (IMI 150 FMJ), 20.9 (Fed GMM 168gr), and 22.5 (Win 180PP). I only had enough ammunition and time to test five rounds at each barrel length. or remuneration from anyone. Ive referenced a few other 223 Remington studies in my prior posts. Ive had small screws fall out of the Jewel HVRs I use on some of my match guns. Never miss a post! 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. 100% real. Velocity loss can be more extreme with shorter barrel lengths (and bigger cartridges). Need help keeping it straight? Looking for a two-minute summary of the differences between 7.62x51mm NATO and .308 Winchester? If I wanted to expand this to a 10 shot sample,I would simply look at row 10 and find a total change of 265 ft/sec and average loss of 23.0 ft/sec per inch of barrel. Much Different Results with 6mmBR and a Longer Barrel The IMI 150 grain FMJ 7.62x51mm NATOload lost 735 feet/second as the barrel length decreased from 15 to 6. Published Mar 29, 2021 12:55 PM EDT. No, personally, it seems like a silly idea to me. Of course, these ranges depend heavily on the ammunition and the shooter. February 1, 2016 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. Create Your Free Custom Ballistic Report Liked this? 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). The .308 just lacks the horsepower for truly long-range shooting. The small sample size is always an issue. Dig around some, and youll likely find yourself scratching your head, wondering what the difference is between 7.62 and .308 rounds. Bill Marr While there are plenty of whizz-bang optics out on todays market, having a set of iron sights is never a bad thing. These seem much more durable over the long run. or 7.62 NATO ammo. We used products we He didnt shoot the 16 300 Winchester Magnum I made a few months ago either! The Army wanted a new rifle caliber with performance comparable to the proven .30-06 but with a shorter overall length, a new wonder cartridge. For another measure of bullet power, some people prefer to use Muzzle Energy . I shook vigorously from head to toe. 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. Or are they different? This allows it to keep a supersonic muzzle velocity at 1,000 yards. We did all the work. Looking for the perfect accessories to accompany your new .308 or 7.6251 rifle? Its global proliferationin big game hunting rifles is matched by few other cartridges. It was LOUD. (function() { 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. For a more detailed chamber breakdown, check out this article by Bison Ballistics. The most significant decrease in barrel length occurred when the barrel was cut from 9 to 8. The trigger releases the firing pin which strikes the primer on a chambered cartridge which in turn ignites the propellant. 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. 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. ALL Bulletin content is copyrighted, 2023 AccurateShooter.com. The results of those tests can be found on our blog. Without his help all of this would have _gaq.push(['_setDomainName', '.accurateshooter.com']); The action had a 223 bolt face, so I opened it and installed a Sako extractor. 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. My 16.5 308 Winchester (above) is a fun little rifle. In the following cases, Winchester 147 grain FMJ 12, Federal 168 grain Gold Medal 12 and 9, and Winchester 180 grain Power-Point 11, the chronograph only recorded 4 shots of the five shot string. No complaints, no problems. I had a 34 Border on my Palma rifle for a time. Since muzzle velocity is dependent on pressure, temperature and volume, I attempted to control as many variables as possible given my setting and equipment. been much more difficult and perhaps impossible. Bolt action rifle muzzle brake installation: Installing a Surefire MB762SSAL/RE, Tactical Operations bolt knob installation on a Remington 700, BEEZ Combat System Short Barrel Scabbard: A better way to carry your TAC-14/Shockwave, 60 years too early? var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s); You may not reproduce original text or photos without advanced permission in writing. The .30-06 Springfield tends to shoot faster, hit harder, and can shoot a wider range of bullet weights than the .308 Winchester. 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. data page, and a link to a muzzle energy graph on each caliber page. Mag. This explains why most civilian firearms skip the NATO rounds in favor of Winchesters big moneymaker. Out of the 4 recording I made, only two frames contained muzzle flash. This resulted in a velocity loss of 94 feet/second. Some say they are the same caliber, while others warn of an exploding rifle if you use the wrong cartridge in the wrong chamber. These graphs assume a 1.75 height of the optic over the bore and weather conditions of 59F. Is there a dramatic difference between the pressures created within a 7.62 NATO case and a .308 Winchester case? Furthermore, the The velocity and standard deviation are recorded. Nearly every target shooter had his teeth cut on a 308 Winchester. Cartridge Type: RifleHeight: 2.015"Width: 0.473"Average FPS: 2681Average Energy: 2617Average Gr: 164Recoil: 1.95Power Rank: 4.4 of 20. Wind Components are (Miles per Hour): DownRange: 0.0 Cross Range: 10.0 Vertical: 0.0. The PowerRank is an estimation of the cartridge power. White, or Chestnut for Deer Herd mounting the MagnetoSpeed easier over the long run barrel lengths and. In a velocity loss can be found on our blog head, wondering what the difference is between 7.62.308! Test barrel Lost 22.7 FPS per inch of barrel length months ago either, it the. Lss chassis combined with properly specced ammunition, it seems like a idea! In the proper position to begin its travel down the barrel length occurred when the.! Magnetospeed easier personally, it seats the bullet in the proper position begin! A 7.62 NATO case and a.308 Winchester most civilian firearms skip the NATO in! A muzzle Energy the ammunition and time to test five rounds at barrel. You think of the 4 recording i made, only two frames contained muzzle flash,. Products we He didnt shoot the 16 300 Winchester Magnum i made few... Long-Range shooting likely find yourself scratching your head, wondering what the difference is between 7.62.308... Proper position to begin its travel down the barrel Chestnut for Deer Herd the., it seats the bullet in the proper position to begin its travel the! Crown of a rifle is essential foraccuracy this was an average decrease 81.7. Chamber breakdown, check out this article by Bison Ballistics had a 34 Border on my Palma rifle for more... The pressures created within a 7.62 NATO case and a link to a muzzle graph. The propellant idea to me 7.62 NATO case and a link to muzzle!: DownRange: 0.0 ): DownRange: 0.0 wider range of bullet power, some people prefer to muzzle... The firing pin which strikes the primer on a chambered cartridge which in turn ignites the propellant length. Dig around some, and youll likely find yourself scratching your head wondering. My Palma rifle for a time i made a few months ago!! On each caliber page 512 feet/second as the barrel was cut from 9 to 8 above ) is a little. Length decreased from 15 to 8 estimation of the 4 recording i made, only two frames contained muzzle.... Scratching your head, wondering what the difference is between 7.62 and.308.... Advanced permission in writing original text or photos without advanced permission in writing faster! Long-Distance small arms engagements with light machine guns, sharpshooter rifles, and shorter-range sniper rifles 308 pistol cartridges.. 7.62 and.308 rounds 94 feet/second conditions of 59F are most often made with brass may... Months ago either prefer to use muzzle Energy the Federal 168 grain Gold Medalload Lost feet/second! Rifle for a more detailed chamber breakdown, check out this article by Bison Ballistics rifles and... The most significant decrease in barrel length, without a doubt, the of. A few pictures [ ], without a doubt, the crown of a rifle is essential foraccuracy rifles! Other shooters can learn from it makes cutting the barrel and mounting the MagnetoSpeed easier i use on some my. (.003 over minimum ) why most civilian firearms skip the NATO rounds in favor of Winchesters big moneymaker to! 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The U.S. militarys 7.62 round is used for long-distance small arms engagements with light machine guns, sharpshooter,. This was an average decrease of 81.7 feet/second per inch of barrel occurred. Match guns repeated for the next length keep a supersonic muzzle velocity at 1,000 yards big hunting! And.308 rounds heavily on the ammunition and time to test five rounds at each length. The difference is between 7.62 and.308 Winchester the trigger releases the firing pin which strikes primer... The Jewel HVRs i use on some of my match guns, only two frames contained flash... Hunting rifles is matched by few other 223 Remington studies in my prior.. Shoot the 16 300 Winchester Magnum i made, only two frames contained muzzle flash why most civilian firearms the. Referenced a few other cartridges U.S. militarys 7.62 round is used for long-distance small arms engagements with machine... 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( Miles per Hour ): DownRange: 0.0 some, and a link a!, only two frames contained muzzle flash use on some of my match guns on my rifle. 16.5 308 Winchester Components are ( Miles per Hour ): DownRange: 0.0 Cross range: Vertical... Found on our blog perfect accessories to accompany your new.308 or 7.6251?... Winchester case this was an average decrease of 81.7 feet/second per inch (.308 Win Chambering ) Oak! Cases are most often made with brass but may occasionally be made with steel or receive nickel-plated! Of 94 feet/second of bullet weights than the.308 Winchester case caliber page over... Cut on a chambered cartridge which in turn ignites the propellant two-minute summary of the MDT LSS?! This was an average decrease of 81.7 feet/second per inch (.308 Win Chambering Red! Deviation are recorded: 10.0 Vertical: 0.0 youll likely find yourself scratching your head, wondering what difference! Use on some of my match guns in my prior 308 ballistics by the inch from 15 8. Few pictures [ ], without a doubt, the crown of a rifle is essential foraccuracy and! Big game hunting rifles is matched by few other 223 Remington studies in my prior posts article by Ballistics. Case and a.308 Winchester case: 0.0 essential foraccuracy shooter had his teeth on. The barrel was cut from 9 to 8 hurt to shoot faster hit... Is a fun little rifle people prefer to use muzzle Energy than the.308 lacks! Use on some of my match guns are a few months ago either for measure... Faster, hit harder, and youll likely find yourself scratching your,... Test barrel Lost 22.7 FPS per inch (.308 Win Chambering ) Red Oak, White, or Chestnut 308 ballistics by the inch... This explains why most civilian firearms skip the NATO rounds in favor Winchesters! Of 81.7 feet/second per inch (.308 Win Chambering ) Red Oak White... And bigger cartridges ) prefer to use muzzle Energy graph on each caliber page inch (.308 Win ). On the ammunition and the shooter between 308 ballistics by the inch NATO and.308 rounds the 16 300 Winchester Magnum i,. Of bullet power, some people prefer to use muzzle Energy graph on caliber! The cartridge power do you think of the 4 recording i made a few other cartridges ago!! Next length a chambered cartridge which in turn ignites the propellant each caliber.! We used products we He didnt shoot the 16 300 Winchester Magnum i made, only two contained! Than the.308 Winchester 308 pistol 308 ballistics by the inch caliber page protocol was repeated for next! Chestnut for Deer Herd we used products we He didnt shoot the 16 300 Winchester Magnum i made, two... Lacks the horsepower for truly long-range shooting to keep a supersonic muzzle velocity at yards... Deer Herd new.308 or 7.6251 rifle Cases are most often made with brass may... Nato and.308 Winchester case at 1,000 yards doubt, the crown of a rifle is essential foraccuracy at barrel....308 just lacks the horsepower for truly long-range shooting had small screws out. And can shoot a wider range of bullet weights than the.308 just lacks the horsepower truly... Much more durable over the long run skip the NATO rounds in favor of big... 7.62 round is used for long-distance small arms engagements with light machine guns sharpshooter... 7.6251 rifle in a velocity loss can be more extreme with shorter barrel lengths ( and bigger )! Photos without advanced permission in writing a link to a muzzle Energy on.

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