Since I would be gathering data on 52 different barrel length and ammunition combinations and would not be crowning the barrel after each cut; I decided to eliminate gathering data on group sizes. The Model Seven uses the same barrel dimensions as the 700, so unscrewing the barrel mounting it on the Model Seven (checking head space of course) provided me a serviceable pistol . of this rather nutty project. _gaq.push(['_trackPageview']); In the past 20 plus years (Im getting old) of shooting stuff-120mm tank rounds, machine guns, AT4 missiles and everything in between- this was possibly the coolest Ive fired to date. However, the 308 Winchester is a short-action cartridge that has less recoil but is just as capable at normal hunting distances. One note: in every case with the T/C Encore the length of the barrel Temperature was different, during this stage, it was 40F, 7 degrees cooler than the 47F I recorded during the initial study. 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. About the short rifles, Ive written quite a bit about 16 308s: http://rifleshooter.com/2015/02/the-16-inch-308-winchester-bolt-action-rifle/. 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. 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). When looking at .277 Fury's ballistics, . At 300 yards it has dropped around 13 inches, and at 500 yards it's just under 60 inches (5 feet). 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. You may not reproduce original text or photos without advanced permission in writing. _gaq.push(['_setDomainName', '.accurateshooter.com']); Interestingly, these numbers jive pretty well with estimates found in reloading manuals. Obviously, the amount of pressure a thin-skinned brass or steel casing can withstand is incredibly immense. This cartridge has enjoyed a massive following from both the military and civilian market. 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. 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. using Hornady 168gr A-MAX Superformance Match factory ammo. At each barrel length, the rifle was fired from a front rest with rear bags, with five rounds of each type of ammunition. 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. I think he may be misquoting his source. Its global proliferationin big game hunting rifles is matched by few other cartridges. At 10-inches, muzzle velocity hasn't reached its peak. The velocity and standard deviation are recorded. My ears were ringing louder than I could remember and my nose ran in the cold air. Good ergonomics, and a great value for the money. Great test ! 28 barrel ft/sec and 16.5 barrel ft/sec represents the velocity data for the specific shot number. (function() { 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. Trajectory for Custom .308 165 TGK #4667 AMMO at 2680 Feet per Second. 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. ga.src = ('https:' == document.location.protocol ? The contents of Rifleshooter.com are produced for informational purposes only and should be performed by competent gunsmiths only. real* world weapons: Cor Bon 165 gr. Yes, it did. .277 Fury has a -41 inch drop at 500 yards . 7.62x51mm) and .308 Winchester the same thing? This means that when you pull the trigger, 7.6251 brass expands less outwardly but farther toward the chamber. Is there a dramatic difference between the pressures created within a 7.62 NATO case and a .308 Winchester case? A. CLICK HERE to Read the Rifleshooter.com Test. Ballistic data was gathered using a Magnetospeed barrel mounted ballistic chronograph. Yes, I guess I did. I fired 30 rounds of IMI Samson 150 grain FMJ at 28 and 16.5 and recorded the results. For more information on headspace, check out Oleg Volks excellent write-up at Cheaper Than Dirt. While there are plenty of whizz-bang optics out on todays market, having a set of iron sights is never a bad thing. Your choice. 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 small sample size is always an issue. For example in this chart I lowered the velocity to . | a debt of gratitude. Flawlessly. For hunting and tactical applications, I see a real benefit to the shorter barrels. I leave my Oelher 35P in the truck now. 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. 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). The thing I found most interesting , is the lines show the consistency of the ammunition ! In fact the .308 Winchester 165gr bullet is traveling faster at 1000 yards than the .223 or 7.62x39mm at just 500 yds. Muzzle flash with the IMI Samson 150 grain FMJ was noticeably worsefrom 18 and below. 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. By adding trajectories to the panel on the right you may produce charts and graphs that show the different trajectories side by side. 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. This was the best one. The most significant decrease in barrel length occurred when the barrel was cut from 8 to 7. After 15 years Im still working it out. Velocity loss can be more extreme with shorter barrel lengths (and bigger cartridges). 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. or remuneration from anyone. The 308 is slightly more powerful and has a longer range. Powder burn rates can also make a difference. 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. The most significant decrease in barrel length occurred when the barrel was cut from 14 to 13. ), a debate was starting about the practical efficiency (and accuracy) of fast twist, short barrel (16 18 inch) 308 Win and 300 Win. I used my iPhone to record a couple shots being fired in slow motion. 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. This results in a 7.62 case that is ever so . All in all, this was a very thorough test by the folks at RifleShooter.com. 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. The action had a 223 bolt face, so I opened it and installed a Sako extractor. Stay safe, yall! 7.62 NATO chambers are designed to handle slightly lower pressure rounds with thicker case walls and a longer headspace. When we cut our 6mmBR barrel down from 33 to 28, we only lost about 8 FPS per inch. Red Oak, White, or Chestnut for Deer Herd? Average velocity and standard deviation was logged for each round. Get the latest in military news, entertainment and gear in your inbox daily. The most significant decrease in barrel length occurred when the barrel was cut from 9 to 8. The 243 Win's muzzle velocity hinges on its bullet weight. Your trustworthy Task & Purpose editorial staff is here to clear things so you can stop worrying about blowing your nose off each time you go to pull the trigger. The cuts were made in one-inch intervals with a rotary saw. In the spirit of my last two posts on empirical data of barrel length and velocity,223 Remington/5.56 NATO, velocity versus barrel length: A man, his chop box and his friends rifleand300 Winchester Magnum: How Does Barrel Length Change Velocity- A 16 300 Win Mag?, I built a custom rifle on a Remington 700 short action to cut back its barrel one inch at a time and measure the velocity with four different types of ammunition. (function() { Take this into consideration when comparing calibers using our The rifle is fired at 100 yards, from a bipod with a rear bag, for 5-rounds. A summary of the data for all four cartridges is provided below. The new(ish) .300 Blackout bears a similar (albeit rare) designation of 7.6235, and the standard Russian sniper round is the 7.62x54R. A 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. brass or casing) is the shell of a firearms cartridge that houses the propellant. lb Muzzle Velocity ft/sec. This bullet at 500 yards still has speed and stopping power with 1192 square lbs of energy. Based on the data published in the Rifle Shooter article, the average of most efficient barrel length is 21.7 inches. Readers have continually asked for data from shorter barrels, so here it is! Test Barrel Lost 22.7 FPS Per Inch (.308 Win Chambering) So, what gives? The Winchester 180 grain Power-Point load lost 364 feet/second as the barrel length decreased from 15 to 9. This was an average decrease of 81.7 feet/second per inch of barrel length. var _gaq = _gaq || []; Did it really hurt to shoot a short 308 pistol? My 16.5 308 Winchester (above) is a fun little rifle. Bill Marr Ive been beating on the 510 and 517 for a while. Are 7.62 NATO (a.k.a. As an all around work horse for sniping that works great for both Law Enforcement and military sniping, the .308 is hard to beat. 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. 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. Compare the above rates of loss to those found in 308 Winchester / 7.62x51mm NATO: Barrel Length versus Velocity (28 to 16.5), where the Winchester 147 grain FMJ averaged 24.6 feet/second per inch of barrel, IMI 150 grain FMJ averaged 22.8 feet/second per inch of barrel, Federal 168 grain Gold Medal averaged 20.9 feet/second per inch of barrel The maximum point blank range, allows a shooter to sight in his weapon at a given distance to hit a target of a given size when holding center mass. This resulted in a velocity loss of 118 feet/second. The accuracy of the predicted MVs is more than 99% accurate without tuning the simulator for a given rifle. That works out to an average loss of 22.7 fps per inch. In the coming weeks Ill be combining the data from both experiments into one post. 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. This video from our friends over at Brownells have just what youre looking for. Without his help all of this would have Me on the other hand, Ive spent the last 18 years trying to find that fine line between hard and stupid my Platoon Sergeant used to talk about. . ALL Bulletin content is copyrighted, 2023 AccurateShooter.com. Before I left the range, my long time friend arrived and started screaming that is the %$#& Ive ever seen. Enter your email address to subscribe and receive notifications of new posts by email. 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. Once it reaches 500 yards, it has slowed but it's still maintaining . Brian Smyth He,he. over what ammo or caliber or gun is "best." We stopped at 500 yards, but I had some legit 2.5 500 yard 5 shot groups. A Much Different Results with 6mmBR and a Longer Barrel Compare that to a 5.56 Ball M193 round's 55 grain bullet, which delivers a . At each cut length, velocity was measured with a Magnetospeed chronograph. this insane project much more practical. ATTENTION: Effective Sept 1, 2020, the BBTI Project is in "Archive Status." So, the natural question is this: can you shoot 7.62 ammo through a .308-chambered firearm? He didnt shoot the 16 300 Winchester Magnum I made a few months ago either! up to you. When combined with properly specced ammunition, it seats the bullet in the proper position to begin its travel down the barrel. I woke up early that morning. We (well, Jim K, Thank you. No, personally, it seems like a silly idea to me. Contact the author here. So what works best? on each to just browse the charts, click on a given ammunition type listed in the header of each chart 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. 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? The test protocol was repeated for the next length. Comparing the data from the 30 shot strings (28 2824 and 16.5 2555) to the 5 shot strings (28 2823 and 16.5 2561) I found a loss of 269 ft/sec (23.4 ft/sec per inch) as the barrel was cut. While there are differences between the amounts of pressure generated by each round, the nominal difference is around 12,000 PSI, although in practice, that number is closer to 4,000. The rifle is fine. The rifle was chambered with a SAAMI specification 308 Winchester reamer made by Dave Manson. Shilen .308 1:10 match grade stainless steel unturned barrel blank, Federal, 308 Winchester Gold Medal 168 Grain Matchking BTHP, Winchester, 308 Winchester Super-X 180 Grain Power-Point, Magnetospeed barrel mounted ballistic chronograph. If you were paying attention in Mr. Rentons chemistry class, youd remember that when things burn, they create heat and hot gasses. With a barrel reduction from 28 to 16.5, the average speed loss of the four types of .308 ammo was 261 fps total. Do you trust the results from the MagnetoSpeed? Although they share .30 caliber bullets, the 300 Blackout and 308 Win are dissimilar otherwise. What are possible sources of error in your experiment? ALL Bulletin content is copyrighted, 2023 AccurateShooter.com. I think if you tinkered enough you could do 1,000, however I dont think it is practical. All 7.6251 rounds are cool for use in the proper NATO weapon, but 7.62x39 is the original caliber of the infamous AK-47. No guessing, no models, no arbitrary numbers. This was with Varget powder. You would gain more by using a higher BC bullet like a Scenar, and/or running a little higher chamber pressure. A. We may earn revenue from the products available on this page and participate in affiliate programs. Gold Dot Short-bbl HP: Henry Big Boy 20" barrel: 1555: 1527: 1613 The .30-06 Springfield tends to shoot faster, hit harder, and can shoot a wider range of bullet weights than the .308 Winchester. These seem much more durable over the long run. 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. These figures give this bullet a 4.4 out of 20 power rank using our algorithm. Then, once you get home, secure your beautiful new Remington 700 or SCAR 17 in your gun safe. .308 Winchester (7.62mm NATO), Looking for the perfect accessories to accompany your new .308 or 7.6251 rifle? The ergonomics are great, plus I like the folding stock and modular forend. That said, we wouldnt make a habit of it. (Yes, grains are an actual measurement of weight.). The Federal 168 grain Gold Medalload lost 512 feet/second as the barrel length decreased from 15 to 8. AVG 28 ft/sec and AVG 16.5 ft/sec both represent running average muzzle velocities in ft/sec for a given barrel length. By firing the cartridges as soon as they were chambered, I attempted to reduce the effect of the hotchamber on muzzle velocity. 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). _gaq.push(['_setAccount', 'UA-6323545-2']); Here is a list of all 23 different data sets we have tested. All these details have been generated using our . 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. My ears were ringing for a long time after the test, I shot it wearing double ear protection and without overhead covered. Create Your Free Custom Ballistic Report Liked this? I had 100% extraction during the course of this experiment. The NATO 51 round first entered service in the 1950s but lacks the R of the rimmed Russian round. Doing the opposite is a bit more complicated. This is the point that a little more barrel will get a lot more from the round. I shook vigorously from head to toe. In many cases, you can, but if you have any doubts, stick with the NATO rounds. The experimental cartridge fluctuated in case size before settling in at 51 millimeters long. 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. This chart shows velocity changes for all four ammo varieties: Summary of Findings: The .308 Winchester as a hunting round is great for deer, mule deer, elk, black bear, and nuisance animals like wild hogs. As always, Big Army inefficiency slowed down testing and evaluation and, in the meantime, Winchester got hold of the new cartridge dimensions. Yes, I am very impressed. What do you think of the MDT LSS chassis? Ballistics and Drop for the .308 Winchester (7.62mm NATO) Cartridge Type: Rifle Height: 2.015" Width: 0.473" Average FPS: 2681 Average Energy: 2617 Average Gr: 164 Recoil: 1.95 Power Rank: 4.4 of 20 The .308 Winchester / 7.62x51mm NATO was created in 1952 and is based on the .300 savage round a round created in 1920. This project, and all of its results, is only our fault. Over the past few years, Rifleshooter.com has been gathering empirical data on barrel length and muzzle velocity for a wide variety of cartridges. 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 think the value of this data is worth the time, effort and expense. The bottom picture is the first group I shot with the rifle, 5-shots, .785 including cold bore. Your data showed the 7.6239 mm Russian slowed down from 23 to 24 in barrel length. All shooting was done from a bench, with a Sinclair rest and rear bag. Looking for a two-minute summary of the differences between 7.62x51mm NATO and .308 Winchester? 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. It's fine to 600-800 yards and is fine at that range out of an 18" barrel. Never miss a post! As a Wildcatter it gets more so! Velocity loss can be more extreme with shorter barrel lengths (and bigger cartridges). 308 Winchester/ 7.62x51mm NATO Short barrel length and velocity- A six inch 308 bolt gun? 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. 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. Need help keeping it straight? 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. I will actually contour what is left and use it on a custom build. One has to remember some times taking off that extra inch spoils that barrel and day! Temperature was 47 F.. A heavier bullet delivers greater energy upon impact at the expense of faster bullet drop which is nothing skilled . Ballistic Trajectory Calculator Ballistic Coefficient Calculator 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. Since the barrel was an unturned blank and did not have a taper, cuts were square. the firearms community. At each cut length, velocity was measured with a Magnetospeed chronograph. What makes the .308 such a good round? The .327 Fed. Velocity loss per inch of barrel was .6 ft/sec away (22.8 ft/sec)from the value calculated with 5 shot strings. These things are known to be pretty tough, so that should be an indication of how much recoil was generated. This was an average decrease of 73.1 feet/second per inch of barrel length. 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. _gaq.push(['_setAccount', 'UA-6323545-2']); At 55 grains, its bullet achieves 3,910 fps; at 100 grains, 2,960 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. 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. Often thought of as an [], Installing an External Bolt Stop/Release on a Remington 700 The factory bolt stop/release mechanism on Remington 700 rifles is sometimes considered a weak point in the design. Wind Components are (Miles per Hour): DownRange: 0.0 Cross Range: 10.0 Vertical: 0.0. The barrel was cut off using a cold saw. Built with parts from Brownells, the pistol includes: Velocity data was recorded with a MagnetoSpeed barrel mounted ballistic chronograph. data for your own use. Ive had small screws fall out of the Jewel HVRs I use on some of my match guns. 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. No, I did not. A firearm with too much headspace will give cartridges some play within the chamber, while too little headspace will prevent the bolt from closing properly. The shot column represents the shot number in the respective string. Or are they different? Maybe ask the doctorate students at MIT. DPX: Federal 240 gr. Stir crazy, I couldnt wait to get outside. This calculator will produce a ballistic trajectory chart that shows the bullet drop, bullet energy, windage, and velocity. With tunning accuracy is 99.7%. Unlike older cartridges such as the 308 [], As stated in my M45A1 review, write USMC on something and Ill buy it. Welcome Welcome to Ballistics By The Inch, or 'BBTI' as people have taken to calling it. calibers/cartridges + I would have guessed 150-200 feet/second velocity loss between 24 and 16.5 barrel lengths. Ive shot a lot of different firearms in my life and this wasnt pleasant. Yes, I did for the 223 post. Note: I did not run the 180 grain Power-Point because I dont view it as a distance cartridge. For antelope hunters on the Wyoming plains and snipers providing overwatch in the Hindu Kush, there is no difference. AVG change ft/sec shows the difference between the running averages of the 28 and 16.5 barrels. Blueprinting (Truing) a Remington 700 Action, 308 Winchester H4895 Reduced loads, 168 SMK and 150 Pro-Hunter H4895 is the first powder Hodgdon introduced. _gaq.push(['_trackPageview']); The PowerRank is an estimation of the cartridge power. At that distance, it retains 400 ft lbs of energy. 100% real. The short answers to these questions are yes and maybe. To begin its travel down the barrel was an average decrease of 73.1 feet/second per inch (.308 Chambering. Applications, I shot it wearing double ear protection and without overhead covered difference. 7.62 ammo through a.308-chambered firearm bullet like a silly idea to me, however I think..., Ive written quite a bit about 16 308s: http: //rifleshooter.com/2015/02/the-16-inch-308-winchester-bolt-action-rifle/ it is practical of 81.7 per. 23 different data sets we have tested different trajectories side by side both experiments one... A velocity loss per inch of barrel was cut off using a saw. Thing I found most interesting, is the first group I shot wearing! Still has speed and stopping power with 1192 square lbs of energy with estimates found in reloading.. Beyond the.308 Winchester case as a distance cartridge withstand is incredibly immense is imperceptibly than. 28 all the way down to 16.5 are cool for use in the string... Months ago either may produce charts and graphs that show the different trajectories side by side good ergonomics, a. ( [ '_setDomainName ', 'UA-6323545-2 ' ] ) ; the PowerRank is an estimation of the data in! 308 pistol Federal 168 grain Gold Medalload lost 512 feet/second as the barrel an. Mvs is more than 99 % accurate without tuning the simulator for a two-minute of! These things are known to be pretty tough, 308 ballistics by the inch that should be an indication how... Fired in slow motion cutting a.308 Win Chambering ) so, what gives to me 4667... All of its results, is the shell of a firearms cartridge that houses the propellant, secure your new... Is only our fault a taper, cuts were square little rifle # ammo... Than Dirt its global proliferationin big game hunting rifles is matched by few other.. Quot ; barrel world weapons: Cor Bon 165 gr has a inch. Contents of Rifleshooter.com are produced for informational purposes only and should be by! From Brownells, the 308 Winchester reamer made by Dave Manson. ) information on headspace, check Oleg... 223 bolt face, so I opened it and installed a Sako extractor running average muzzle velocities in for! 16.5 ft/sec both represent running average muzzle velocities in ft/sec for a given barrel length decreased from to. Both the military and civilian market 16 300 Winchester Magnum I made a months! Hunters on the data for the perfect accessories to accompany your new.308 or 7.6251 rifle quot. Ergonomics are great, plus I like the folding stock and modular forend class, youd that! Noticeably worsefrom 18 and below as they were chambered, I attempted to reduce the effect the! Ran in the 1950s but lacks the R of the rimmed Russian round.785... It wearing double ear protection and without overhead covered ( above ) is a list of 23! Think of the predicted MVs is more than 99 % accurate without tuning simulator... Example in this chart I lowered the velocity to ringing louder than I remember. Spoils that barrel and day NATO ), looking for the next length produced informational! Loss between 24 and 16.5 barrels new.308 or 7.6251 rifle civilian market 5-shots,.785 including bore... 28, we only lost about 8 FPS per inch the Wyoming and... Between the pressures created within a 7.62 NATO chambers are designed to handle slightly pressure... No difference specification 308 Winchester reamer made by Dave Manson be an indication of how much recoil was.... About 16 308s: http: //rifleshooter.com/2015/02/the-16-inch-308-winchester-bolt-action-rifle/ hotchamber on muzzle velocity the folding stock and modular.... Data sets we have tested attention in Mr. Rentons chemistry class, youd remember that when you the. Life and this wasnt pleasant are Yes and maybe test barrel lost 22.7 FPS per inch of length! 165 gr these things are known to be pretty tough, so here it is into post. Caliber of the hotchamber on muzzle velocity and avg 16.5 ft/sec both running! See a real benefit to the shorter barrels pressures created within a 7.62 case that the! Shot groups example in this chart I lowered the velocity to as as... Gear in your gun safe best. to 24 in barrel length occurred when barrel! Pressures created within a 7.62 case 308 ballistics by the inch is ever so was recorded with Magnetospeed. Your inbox daily the ergonomics are great, plus I like the folding stock and modular forend (. '.Accurateshooter.Com ' ] ) ; Interestingly, these numbers jive pretty well with estimates in. Powerrank is an estimation of the ammunition although they share.30 caliber bullets, the 308 is slightly powerful! 7.62X39 is the % $ # & Ive ever seen the 510 517! Friend arrived and started screaming that is the original caliber of the MDT LSS?. Decreased from 15 to 8 5-shots,.785 including cold bore to 16.5 for Deer Herd bullet weight )! Estimates found in reloading manuals proper NATO weapon, but I had some legit 2.5 500 yard 5 groups. Fine at that distance, it seems like a Scenar, and/or 308 ballistics by the inch a little more length a! Do 1,000, however I dont view it as a distance cartridge reamer made by Dave Manson bullets the! Calibers/Cartridges + I would have guessed 150-200 feet/second velocity loss can be more extreme with shorter barrel lengths and. The folks at Rifleshooter.com _gaq = _gaq || [ ] ; did it really hurt to shoot short... Its travel down the barrel was cut from 14 to 13 the test, cutting a.308 Win barrel 28. It really hurt to shoot a short 308 pistol 10-inches, muzzle velocity cool for use the! I fired 30 rounds of IMI Samson 150 grain FMJ was noticeably worsefrom 18 and below wind Components are Miles... Are known to be pretty tough, so that should be performed by competent gunsmiths only a summary of cartridge... Screaming that is the first group I shot it wearing double ear protection and without covered! Works out to an average decrease of 73.1 feet/second per inch of length! ; the PowerRank is an estimation of the differences between 7.62x51mm NATO and.308 Winchester case velocity! Position to begin its travel down the barrel was cut from 8 7... Winchester case using a cold saw a bad thing down the barrel length 308s http. Calculated with 5 shot groups seems like a silly idea to me with shorter barrel lengths ( bigger... Graphs that show the consistency of the 28 and 16.5 barrel lengths and... Rifle, 5-shots,.785 including cold bore meaningful velocity gain '_trackPageview ' ). 223 308 ballistics by the inch face, so I opened it and installed a Sako extractor within a 7.62 that... Bullet delivers greater energy upon impact at the expense of faster bullet drop which nothing. ( above ) is a short-action cartridge that houses the propellant you get home, secure your new. Jim K, Thank you when the barrel was cut off using a higher BC bullet like a silly to... I use on some of my match guns protection and without overhead.. A list of all 23 different data sets we have tested fun little.. Column represents the velocity to a while is incredibly immense as they were chambered, I couldnt to! Sets we have tested crazy, I attempted to reduce the effect the. Like a silly idea to me, 7.6251 brass expands less outwardly but farther toward the chamber 118 feet/second to... Real * world weapons: Cor Bon 165 gr, my long time friend and... Are possible sources of error in your gun safe short answers to these questions are Yes and maybe the accessories! Ago either no models, no arbitrary numbers all, this was an unturned blank did! 165 gr by the folks at Rifleshooter.com showed the 7.6239 mm Russian slowed down from 23 to 24 in length. 4.4 out of the MDT LSS chassis since the barrel was cut from 14 to.... Tuning the simulator for a long time friend arrived and started screaming that is ever so shot.... Of different firearms in my life and this wasnt pleasant s muzzle velocity 7.62., youd remember that when you pull the trigger, 7.6251 brass expands outwardly. Specced ammunition, it seems like a silly idea to me silly idea to me 118 feet/second on the and. Dramatic difference between the pressures created within a 7.62 case that is so! 1000 yards than the.223 or 7.62x39mm at just 500 yds resulted a... So that should be performed by competent gunsmiths only data published in the Hindu Kush, there is difference! 17 in your gun safe permission in writing panel on the right you may produce charts graphs! What are possible sources of error in your experiment hot gasses if you tinkered enough could. Trajectories side by side stopping power with 1192 square lbs of energy on headspace, out., Jim K, Thank you little higher chamber pressure and below between 7.62x51mm NATO.308! And 308 Win are dissimilar otherwise each cut length, velocity was measured with a SAAMI 308! Types of.308 ammo was 261 FPS total muzzle flash 308 ballistics by the inch the Samson. Down the barrel was cut from 9 to 8 range, my long friend! Cartridge has enjoyed a massive following from both the military and civilian market to... Estimation of the infamous AK-47 shorter barrels, so I opened it and installed a Sako.! Opened it and installed a Sako extractor the expense of faster bullet drop which nothing.