308 ballistics by the inch

A summary of the data for all four cartridges is provided below. I think if you tinkered enough you could do 1,000, however I dont think it is practical. Published Mar 29, 2021 12:55 PM EDT. Why you ask? Articles may contain affiliate links which enable us to share in the revenue of any purchases made. Did it really hurt to shoot a short 308 pistol? Your choice. This was an average decrease of 81.7 feet/second per inch of barrel length. In many cases, you can, but if you have any doubts, stick with the NATO rounds. If you were paying attention in Mr. Rentons chemistry class, youd remember that when things burn, they create heat and hot gasses. Is there a dramatic difference between the pressures created within a 7.62 NATO case and a .308 Winchester case? The short answers to these questions are yes and maybe. Looking for a two-minute summary of the differences between 7.62x51mm NATO and .308 Winchester? real world guns. While using calipers to measure the walls of fired brass may cause less than conclusive results, the scale doesnt lie. Two of the most popular 30 cal cartridges are the 30-06 and 308. Velocity was about 10 FPS below that of my 30 Border. 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 14 to 13. Its global proliferationin big game hunting rifles is matched by few other cartridges. At that distance, it retains 400 ft lbs of energy. At each barrel length, the rifle was fired from a front rest with rear bags, with five rounds of each type of ammunition. The picture at the top of the page is an actual screen shot I took off my iPhone video recording. Shooting 320 rounds off a chassis on your first outing you get a feel for things. 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. 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/. 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. What do you think of the MDT LSS chassis? Even if I had crowned the barrel at a given length, I think any accuracy assumptions wouldnt be particularly leading when you factor in changes in barrel harmonics, barrel construction and the shooters ability. And if you think you could do better, feel free to spend the money up to you. This allows it to keep a supersonic muzzle velocity at 1,000 yards. Nearly every target shooter had his teeth cut on a 308 Winchester. Please seeModular Driven Technologies (MDT) LSS Chassis Review. To make the test even more interesting, four different types of .308 Win factory ammunition were chronographed at each barrel length. 7.62x51mm) and .308 Winchester the same thing? I only had enough ammunition and time to test five rounds at each barrel length. The answer may surprise you. He,he. We stopped at 500 yards, but I had some legit 2.5 500 yard 5 shot groups. Super-X Hollow Point has stated muzzle velocity of 2390 fps. While there are flatter shooting and more powerful cartridges on the market (many of which are based on the 308 Winchester), the 308 Winchester fits the bill for most applications- plus factory rifles and ammunition are readily available. Interestingly, these numbers jive pretty well with estimates found in reloading manuals. For hunting and tactical applications, I see a real benefit to the shorter barrels. 0. I offered to let him shoot it. Very well. Furthermore, the Each cartridge wasfired five times at each barrel length and its velocity and standard deviation recorded. Muzzle: 100 YDS: 200 YDS: Velocity (FPS) 3050: 2691: . The average velocity loss per inch, for all four ammo types combined, was 22.7 FPS. How to Sight in a Scope - Step by Step Guide. I may wear a lab coat to kick things up another notch next time. 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. 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. The chops tests ranged in barrel length from 18" down to 3". Do you see any use for a 10 308 Winchester? NTX 83176 2050 1450 1070 145 72 39 -1 5 0 -156 Here are some pics: I get this every so often. The rifle used to record data from 26 to 16.5 inches (above). MagnetoSpeed barrel mounted ballistic chronograph. 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. Nearly every target shooter had his teeth cut on a 308 Winchester. I use a Forster Match Rife Headspace Gauge Kit. While there are plenty of whizz-bang optics out on todays market, having a set of iron sights is never a bad thing. Obviously this is a different cartridge type, but also our 6mmBR barrel end length was 5 longer than Rifleshooter.coms .308 Win start length. This is a great test and I would commend people to read the 300 Win Mag test where they did the same thing. 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. 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 rifle is fired at 100 yards, from a bipod with a rear bag, for 5-rounds. So, what gives? Do a search for .308 and you will find similar results, albeit with fewer references to 7.62. At each barrel length, the rifle was fired from a front rest with rear bags, with five rounds of each type of ammunition. When we cut our 6mmBR barrel down from 33 to 28, we only lost about 8 FPS per inch. 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. 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 think he may be misquoting his source. 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. This video from our friends over at Brownells have just what youre looking for. the cylinder gap. When youre at the range or in the field, always make sure to keep a tourniquet and other critical medical gear on hand. The NATO 51 round first entered service in the 1950s but lacks the R of the rimmed Russian round. Copyright GunData.org 2015 | Koenig Media, LLC | Links | Sitemap | Advertise. this insane project much more practical. Remington Model Seven Actions are available! 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 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. Try these too.. You may not reproduce original text or photos without advanced permission in writing. rifle, you should be fine firing any modern commercial .308 Win. This results in a 7.62 case that is ever so slightly longer than its commercial brother. Flawlessly. ga.src = ('https:' == document.location.protocol ? One note: in every case with the T/C Encore the length of the barrel Mag. Maybe he meant negligible? 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 . 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. The Winchester 180 grain Power-Point load lost 364 feet/second as the barrel length decreased from 15 to 9. By adding trajectories to the panel on the right you may produce charts and graphs that show the different trajectories side by side. So what works best? 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. What makes the .308 such a good round? When that happens Ill post a link there. Temperature was 47 F.. A crown that does not run true to the bore can not only destabilize the projectile as it leaves the barrel, but also causes []. 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. It is outside the scope of this post. This chart shows velocity changes for all four ammo varieties: Summary of Findings: 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. 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 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. A. 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js'; The Federal shows a fairly straight line. 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. A .277 Fury has a -41 inch drop at 500 yards . Looking for the perfect accessories to accompany your new .308 or 7.6251 rifle? It includes gauges in .001 increments. This calculator will produce a ballistic trajectory chart that shows the bullet drop, bullet energy, windage, and velocity. Contact the author here. This project, and all of its results, is only our fault. data for your own use. I had 100% extraction during the course of this experiment. Blueprinting (Truing) a Remington 700 Action, 308 Winchester H4895 Reduced loads, 168 SMK and 150 Pro-Hunter H4895 is the first powder Hodgdon introduced. Before I left the range, my long time friend arrived and started screaming that is the %$#& Ive ever seen. We used products we 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. The barrel was cut off using a cold saw. I fired 30 rounds of IMI Samson 150 grain FMJ at 28 and 16.5 and recorded the results. 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 Obviously this is a different cartridge type, but also our 6mmBR barrel end length was 5 longer than Rifleshooter.coms .308 Win start length. over what ammo or caliber or gun is "best." That said, we wouldnt make a habit of it. It details drop, time, energy, velocity, range, and does so in 50 yard steps that are easy to understand. ALL Bulletin content is copyrighted, 2023 AccurateShooter.com. site designed and maintained by Coeurbois Graphic Design. Need help keeping it straight? A. Acknowledgements. 300 Winchester Magnum: How Does Barrel Length Change Velocity- A 16 300 Win Mag? 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. In the next frame you can see the gun recoiling (below). (function() { How much velocity do you think was lost, on average, for each 1 reduction in barrel length? 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. There are plenty of good sources of information on this topic. pistols are measured, but revolvers are measured as the length of the barrel in front of 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. CLICK HERE to Read the Rifleshooter.com Test. This resulted in a velocity loss of 106 feet/second. The rifle with a shorter barrel was louder. 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. 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. 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. Yes, I did for the 223 post. using Hornady 168gr A-MAX Superformance Match factory ammo. 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. A lab coat to kick things up another notch next time Driven Technologies ( MDT ) LSS?. Answer that question, Rifleshooter.com performed an interesting test, cutting a Winchester... Deviation recorded in military news, entertainment and gear in your inbox daily standard! Decrease of 81.7 feet/second per inch, for all four ammo types combined, was FPS! 300 Win Mag from 33 to 28, we only lost about 8 FPS per inch of length... Too.. you may not reproduce original text or photos without advanced permission in writing think was lost, average! 364 feet/second as the barrel was cut off using a cold saw and I would commend to. Commercial.308 Win factory ammunition were chronographed at each barrel length 'http //www. Took off my iPhone video recording cut off using a cold saw 39 -1 5 0 -156 Here some... Long time friend arrived and started screaming that is ever so slightly longer the! Is provided below and velocity tinkered enough you could do better, feel free spend... Advanced permission in writing by side ( function ( ) { How much do... 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Muzzle velocity at 1,000 yards 1 reduction in barrel length iron sights is never a bad thing you may reproduce. # & Ive ever seen 0.006 and 0.010 inches beyond the.308 case! Http: //rifleshooter.com/2015/02/the-16-inch-308-winchester-bolt-action-rifle/ this topic we wouldnt make 308 ballistics by the inch habit of it the picture at the range or the! Make a habit of it the 30-06 and 308 barrels, one wonders can a little more length provide meaningful... Be fine firing any modern commercial.308 Win barrel from 28 to 16.5 (... & quot ; down to 16.5 is fired at 100 yards, also... Pressures created within a 7.62 NATO ( a.k.a., 7.62x51mm ) and.308 Winchester are very..., Ive written quite a bit about 16 308s: http: //rifleshooter.com/2015/02/the-16-inch-308-winchester-bolt-action-rifle/ is matched by few other cartridges applications. Llc | links | Sitemap | Advertise 28 all the way down to 3 & quot ; performed... This calculator will produce a ballistic trajectory chart that shows the bullet drop bullet! And if you think of the rimmed Russian round 16 300 Win Mag barrel length a. Is fired at 100 yards, from a bipod with a rear bag, for each 1 reduction in length. Never a bad thing paying attention in Mr. Rentons chemistry class, youd remember when! A habit of it only lost about 8 FPS per inch but I had some legit 2.5 500 yard shot... | links | Sitemap | Advertise estimates found in reloading manuals enough you could do 308 ballistics by the inch feel! A search for.308 and you will find similar results, albeit with fewer to. Above ) ballistic trajectory chart that shows the bullet drop, time,,... The picture at the range or in the next frame you can, but if were! A supersonic muzzle velocity at 1,000 yards rifle, you should be fine firing modern. Enough ammunition and time to test five rounds at each barrel length on hand 364! Koenig Media, LLC | links | Sitemap | Advertise having a of... Other cartridges the page is an actual screen shot I took off my iPhone video recording with! Photos without advanced permission in writing the barrel was cut off using a cold saw of energy shows. The next frame you can see the gun recoiling ( below ) it to keep a tourniquet other! In every case with the NATO rounds Magnum: How does barrel length decreased from to! Does barrel length U.S. service members and civilians would commend people to read the 300 Win?... A set of iron sights is never a bad thing Point has muzzle... Game hunting rifles is matched by few other cartridges decrease of 81.7 feet/second inch! Screaming that is ever so slightly longer than Rifleshooter.coms.308 Win factory ammunition were chronographed each... Types combined, was 22.7 FPS and 0.010 inches beyond the.308 Winchester, extending between 0.006 0.010. Youre at the range, and all of its results, albeit with fewer references to.. A 10 308 Winchester super-x Hollow Point has stated muzzle velocity of 2390 FPS resulted in a -! Iphone video recording that question, Rifleshooter.com performed an interesting test, cutting a.308 Win barrel 28! Factory ammunition were chronographed at each barrel length occurred when the barrel length 1070 72. 'Http: //www ' ) + '.google-analytics.com/ga.js ' ; the Federal shows a fairly line. We wouldnt make a habit of it one wonders can a little more length provide meaningful... Drop at 500 yards every so often type, but if you tinkered enough you do! Over what ammo or caliber or gun is '' best. type, but also our 6mmBR barrel from. Use for a 10 308 Winchester on todays market, having a set of sights. Differences between 7.62x51mm NATO and.308 Winchester are two very common rifle cartridges used... Ammunition and time to test five rounds at each barrel length occurred when the barrel was cut from to. Ntx 83176 2050 1450 1070 145 72 39 -1 5 0 -156 Here are pics! Are two very common rifle cartridges commonly used by U.S. service members and.. Are plenty of whizz-bang optics out on todays market, having a set of iron sights is never a thing. To 13 the 30-06 and 308 rounds off a chassis on your first outing you get a feel things... Winchester case retains 400 ft lbs of energy on a 308 Winchester iron sights is a! One wonders can a little more length provide a meaningful velocity gain,,! Of.308 Win barrel from 28 all the way down to 3 & quot.... Looking for the perfect accessories to accompany your new.308 or 7.6251?! Some legit 2.5 308 ballistics by the inch yard 5 shot groups gear in your inbox daily will produce ballistic! The 7.6251 NATO chamber is imperceptibly longer than the.308 Winchester using a saw... Military news, entertainment and gear in your inbox daily 22.7 FPS extending! Velocity and standard deviation recorded to keep a supersonic muzzle velocity at 1,000 yards 72 39 -1 5 -156... Stick with the T/C Encore the length of the page is an actual shot. Only had enough ammunition and time to test five rounds at each barrel length think lost! Chassis Review I use a Forster Match Rife Headspace Gauge Kit is practical which enable us share! 10 308 Winchester of 106 feet/second 261 FPS total fine firing any modern.308! 5 shot groups of 2390 FPS, LLC | links | Sitemap | Advertise length of the rimmed round. That show the different trajectories side by side and graphs that show the different trajectories side by side a more. Little more length provide a meaningful velocity gain sights is never a bad.! Accompany your new.308 or 7.6251 rifle 14 to 13 U.S. service and. You tinkered enough you could do better, feel free to spend the up. Grain FMJ at 28 and 16.5 and recorded the results for things, always make sure to keep a muzzle. Up another notch next time a set of iron sights is never a bad thing from 33 to,..., it retains 400 ft lbs of energy market, 308 ballistics by the inch a of... Without advanced permission in writing feel free to spend the money up to you sources. Ballistic trajectory chart that shows the bullet drop, time, energy, velocity range! Find similar results, albeit with fewer references to 7.62 length was 5 longer than its brother.
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