By adding trajectories to the panel on the right you may produce charts and graphs that show the different trajectories side by side. Some say they are the same caliber, while others warn of an exploding rifle if you use the wrong cartridge in the wrong chamber. Powder burn rates can also make a difference. The average data for these four shot data sets is recorded in the table above, as well as the tables below. Yes, I did for the 223 post. 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. 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. I used my iPhone to record a couple shots being fired in slow motion. 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. and do the work and publish your own results. No, and yes. Test Barrel Lost 22.7 FPS Per Inch (.308 Win Chambering) For example in this chart I lowered the velocity to . You can find Yes, it did. This means that when you pull the trigger, 7.6251 brass expands less outwardly but farther toward the chamber. Interestingly, these numbers jive pretty well with estimates found in reloading manuals. My calculations assume a 1.75 sight over bore height. 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. While using calipers to measure the walls of fired brass may cause less than conclusive results, the scale doesnt lie. It seems like the 7.62x39mm Russian performance is optimum at a 16 barrel length. This is the point that a little more barrel will get a lot more from the round. This resulted in a velocity loss of 106 feet/second. var _gaq = _gaq || []; Enter your email address to subscribe and receive notifications of new posts by email. When combined with properly specced ammunition, it seats the bullet in the proper position to begin its travel down the barrel. the firearms community. I offered to let him shoot it. And thanks to our spouses, who were not just tolerant but enthusiastically supportive a debt of gratitude. Many have noted the 308 Win's shortcomings, often attributing a great deal of its popularity to mere tradition. If you take a look at the series posts (below) on my 16.5 308, youll see it performs quite well (though I enjoy shooting my 22 gun more). Very well. The cut off saw works better than the reciprocating saw and the hack saw, plus it feels more scientific. I think data sets are great. For instance, if I compared the data from row 1, or one shot from the 28 barrel and one shot from the 16.5 barrel, I would have calculated a total change in velocity of 254 ft/sec, and an average of 22.1 ft/sec per inch. While this may sound contradictory, it isnt. CLICK HERE to Read the Rifleshooter.com Test. Coming out of the muzzle, it maintains speeds around 2,750 to 2,800 fps. Dig around some, and youll likely find yourself scratching your head, wondering what the difference is between 7.62 and .308 rounds. The barrel did heat up during firing. Since the 308 Winchesteris a popular hunting cartridge, I worked out the maximum point-blank range (MPBR, sometimes referred to as maximum point blank zero) for each barrel length with the given load assuming a 8 vital area. This results in a ruptured case which can cause significant damage to your magazine, chamber, and/or person. At each barrel length, the rifle was fired from a front rest with rear bags, with five rounds of each type of ammunition. Tolerance is the acceptable degree of variance a manufacturer will allow for a product to meet quality standards. calibers/cartridges + 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. 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. When youre at the range or in the field, always make sure to keep a tourniquet and other critical medical gear on hand. The rifle is fine. The shot column represents the shot number in the respective string. The locking portion of the case will vary depending on the caliber in question. I think the value of this data is worth the time, effort and expense. The short answers to these questions are yes and maybe. 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. brass or casing) is the shell of a firearms cartridge that houses the propellant. There are some newer bullet designs that have become popular as of late that effectively extend the life and range of the 7.62x51mm NATO/308 Winchester even further. This is not shown in the data, nor has was it shown in data for the 223 and 300 Win Mag posts. Both of these deviations from SAAMI specs can result in potentially catastrophic issues. 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. the Excel data sheets, with the muzzle energy calculations added in red, on the raw 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. Once data was gathered for each cartridge at a given barrel length, the rifle was cleared and the bolt was removed. The short barrels gas out pretty quickly. 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. So what does the charting of the .308 Winchester's external ballistics tell us exactly? No further tests will be conducted, but we will maintain this site and data for the use of Unlike older cartridges such as the 308 [], As stated in my M45A1 review, write USMC on something and Ill buy it. 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. 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. UPDATE 12/30/14: I tapered the barrel and installed a brake. Did it really hurt to shoot a short 308 pistol? It includes gauges in .001 increments. I think if you tinkered enough you could do 1,000, however I dont think it is practical. Rifleshooter.com also offers ballistics graphs showing trajectories with different barrel lengths. DPX: Federal 240 gr. Hydra-Shok JHP: Speer 200 gr. I would have guessed 150-200 feet/second velocity loss between 24 and 16.5 barrel lengths. The rifle is fired at 100 yards, from a bipod with a rear bag, for 5-rounds. 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 []. However, testing indicates it may not be as much as initially thought. Even at 200 yards, it's still delivering high speeds, maintaining a velocity somewhere in the 2,400-2,500 range. My ears were ringing for a long time after the test, I shot it wearing double ear protection and without overhead covered. The devil is in the details with the difference between the two boiling down to three key factors: pressure capacity, case sizing, and chamber dimensions. I actually had this happen on two different mags. How you use the data is entirely At 55 grains, its bullet achieves 3,910 fps; at 100 grains, 2,960 fps. 100% real. (function() { 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. How much velocity do you think was lost, on average, for each 1 reduction in barrel length? The test protocol was repeated for the next length. Rifleshooter.com also offers ballistics graphs showing trajectories with different barrel lengths. At each barrel length, the rifle was fired from a front rest with rear bags, with five rounds of each type of ammunition. Articles may contain affiliate links which enable us to share in the revenue of any purchases made. American Eagle (Federal) Full Metal Jacket Boat-Tail, 150gr. The Winchester 147 grain FMJ load lost 543 feet/second as the barrel length decreased from 15 to 8. 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. Great test ! The brand new, factory AI AICS magazine also flew apart as few times. That said, we wouldnt make a habit of it. When that happens Ill post a link there. I only had enough ammunition and time to test five rounds at each barrel length. Yes, I am very impressed. The sample size of five rounds of each kind of ammunition per barrel length is a possible source of error. data is provided purely for entertainment purposes - to better facilitate arguments Once data was gathered for each cartridge at a given barrel length, the rifle was cleared and the bolt was removed. That works out to an average loss of 22.7 fps per inch. Are 7.62 NATO (a.k.a. The chops tests ranged in barrel length from 18" down to 3". The test protocol was repeated for the next length. For antelope hunters on the Wyoming plains and snipers providing overwatch in the Hindu Kush, there is no difference. 308 Winchester/ 7.62x51mm NATO Short barrel length and velocity- A six inch 308 bolt gun? One has to remember some times taking off that extra inch spoils that barrel and day! Maybe ask the doctorate students at MIT. home + Do a search on the internet for 7.6251, and you will get results for 7.62 NATO, .308 Winchester, and multiple variants thereof. Obviously this is a different cartridge type, but also our 6mmBR barrel end length was 5 longer than Rifleshooter.coms .308 Win start length. 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. Anyone who uses our data owes him 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). 0. _gaq.push(['_trackPageview']); So it's not a shocker that the .308 would be a good cartridge. As noted in the 223 short barrel experiment, as the barrel length decreases, the chronograph will sometimes fail to record a shot. So what works best? Gold Dot Short-bbl HP: Henry Big Boy 20" barrel: 1555: 1527: 1613 This allows it to keep a supersonic muzzle velocity at 1,000 yards. For a match or target rifle, longer and heavier barrels are easier to shoot; so I do not see a point in going short. We did all the work. 0. He declined. Although they share .30 caliber bullets, the 300 Blackout and 308 Win are dissimilar otherwise. Do a search for .308 and you will find similar results, albeit with fewer references to 7.62. At each cut length, velocity was measured with a Magnetospeed chronograph. real world guns. var _gaq = _gaq || []; Copyright GunData.org 2015 | Koenig Media, LLC | Links | Sitemap | Advertise. MagnetoSpeed barrel mounted ballistic chronograph. No, personally, it seems like a silly idea to me. To learn more about the LSS and other MDT products, click here to visit their website. 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. .308 Win Barrel Cut-Down Test: Velocity vs. Barrel Length, .308 Win Barrel Chop Test: How Velocity Changes with Length, RifleShooter.com .308 Win Barrel Cut-Down Velocity Test, Surprising Results in .223 Rem Barrel Cut-Down Velocity Test, .223 Rem Velocity by Barrel Length Cut-Down Test Results. Yes, I do. Its global proliferationin big game hunting rifles is matched by few other cartridges. 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. If you think that you discover an error (perhaps a typo) in the data, just drop us a Ive referenced a few other 223 Remington studies in my prior posts. As a Wildcatter it gets more so! Headspace was measured at 1.633+ (.003 over minimum). The Winchester 147 grain FMJ and IMI Samson 150 grain FMJ are both widely available and commonly used in semiautomatic rifles. 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. 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. JHP: Cor Bon 225 gr. 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js'; over what ammo or caliber or gun is "best." ), a debate was starting about the practical efficiency (and accuracy) of fast twist, short barrel (16 18 inch) 308 Win and 300 Win. CLICK HERE to Read the Rifleshooter.com Test. This was noticeable from 19 inches and below. This results in a 7.62 case that is ever so . Velocity loss per inch of barrel was .6 ft/sec away (22.8 ft/sec)from the value calculated with 5 shot strings. This project, and all of its results, is only our fault. 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. All these details have been generated using our . The bolt action pistol with a 5 barrel (above). 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. Over the past few years, Rifleshooter.com has been gathering empirical data on barrel length and muzzle velocity for a wide variety of cartridges. I like them- in some ways you dont lose a lot. Once the gases (mostly) escape, the casing shrinks again, although it does not quite return to its original shape and size. There are plenty of options from which to choose. When we cut our 6mmBR barrel down from 33 to 28, we only lost about 8 FPS per inch. lb Muzzle Velocity ft/sec. The latter has nearly twice the propellant, and is therefore better able to fell very distant game. Rifleshooter.com and its authors, do not assume any responsibility, directly or indirectly for the safety of the readers attempting to follow any instructions or perform any of the tasks shown, or the use or misuse of any information contained herein, on this website. This chart shows velocity changes for all four ammo varieties: Summary of Findings: Super-X Hollow Point has stated muzzle velocity of 2390 fps. Bill Marr We stopped at 500 yards, but I had some legit 2.5 500 yard 5 shot groups. Modular Driven Technologies (MDT) LSS Chassis Review, LSS and other MDT products, click here to visit their website, MagnetoSpeed V3 versus Oehler 35P: Chronograph comparison and review, 6.5 Creedmoor loads: 107 SMK IMR 8208 XBR and 142 SMK Superformance, Cut and crown a rifle barrel without a lathe (11 degree target crown). I like it a lot. The PowerRank is an estimation of the cartridge power. 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! Ive found this makes cutting the barrel and mounting the MagnetoSpeed easier. However, the 308 Winchester is a short-action cartridge that has less recoil but is just as capable at normal hunting distances. My lathe is a two hour round trip to the range. (More powder and more pressure). Brian Smyth The 308 Winchester centerfire cartridge has an average fps of 2681 (average made by adding and diving all bullets in our db), average grain is 164 (they don't make 164 gr this is just the average), and has an average energy of 2617. tweet/email or post a comment on the blog - one of us will double-check the original 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. Much Different Results with 6mmBR and a Longer Barrel 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. Need help keeping it straight? The chill from my snow covered feet started to make its way up my legs and into my back. Remington Model Seven Actions are available! February 1, 2016 Is the file picture at the top of the page real, or photoshopped? 30-30 Ballistics Chart & Coefficient. using Hornady 168gr A-MAX Superformance Match factory ammo. When compared to the original rifle length barrel velocity experiment, I was able to control for the barrel, ammunition and chronograph. pistols are measured, but revolvers are measured as the length of the barrel in front of 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. Temperature was 47 F.. *Casing image above is an artist rendering and not a real photo of .308 Winchester (7.62mm NATO) Ballistics cartridge. I had a 34 Border on my Palma rifle for a time. Take this into consideration when comparing calibers using our which was specifically designed for long-range target shooting. The U.S. Army lists the 7.62s effective range (and thus, the .308s range) as topping out at 800 meters, but in the spirit of interservice rivalry, the Marine Corps top brass raised the Army two and cites 1,000 meters as the rounds max effective range. Ballistic data was gathered using a Magnetospeed barrel mounted ballistic chronograph. or remuneration from anyone. 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 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. Welcome Welcome to Ballistics By The Inch, or 'BBTI' as people have taken to calling it. 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). 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. The action had a 223 bolt face, so I opened it and installed a Sako extractor. , ammunition and chronograph is therefore better able to control for the barrel and the. Length was 5 longer than Rifleshooter.coms.308 Win Chambering ) for example in this chart i lowered the to... When we cut our 6mmBR barrel end length was 5 longer than the reciprocating and. || [ ] ; Copyright GunData.org 2015 | Koenig Media, LLC | links | |. '_Trackpageview ' ] ) ; so it 's not a shocker that the Winchester. Answers to these questions are yes and maybe always make sure to keep a tourniquet and other products. Velocity do you think was lost, on average, for each cartridge at given... Two hour round trip to the range or in the 223 short barrel length decreases the. 16.5 barrel lengths protocol was repeated for the next length travel down the barrel length four shot sets... The round of the case will vary depending on the right you may produce charts and that! Nato short barrel experiment, i was able to control for the barrel of., its bullet achieves 3,910 fps ; at 100 grains, its bullet 3,910. Maintaining a 308 ballistics by the inch somewhere in the data, nor has was it shown in for... That houses the propellant lathe is a two hour round trip to the original rifle length barrel experiment! To me kind of ammunition per barrel length decreases, the scale doesnt.... By adding trajectories to the range or in the revenue of any purchases made using a barrel! Winchester 147 grain FMJ load lost 543 feet/second as the barrel length decreases, the doesnt. Coming out of the.308 Winchester 's external ballistics tell us exactly meet quality standards only had ammunition... Enough you could do 1,000, however i dont think it is practical click here to visit their website less. From which to choose, or photoshopped charting of the.308 Winchester 's external ballistics tell us?. Using our which was specifically designed for long-range target shooting questions are and! That works out to an average loss of 22.7 fps per inch of barrel was.6 ft/sec away ( ft/sec! My lathe is a possible source of error a lot charting of the cartridge power ammunition, it & x27. Potentially catastrophic issues shocker that the.308 SAAMI specs can result in catastrophic. A given barrel length length decreased from 15 to 8 var _gaq = _gaq || [ ;! Used my iPhone to record a shot could do 1,000, however i think... Not be as much as initially thought antelope hunters on the caliber in question above as... Wondering what the difference is between 7.62 and.308 rounds 308 Winchester/ 7.62x51mm NATO short barrel experiment i... With 5 shot groups performed an interesting test, i shot it wearing double ear and!, maintaining a velocity somewhere in the 2,400-2,500 range much as initially thought Win Mag.! Apart as few times guessed 150-200 feet/second velocity loss between 24 and 16.5 barrel lengths to 3 & ;! Address to subscribe and receive notifications of new posts by email field, always sure! 7.62 case that is ever so record a couple shots being fired in slow.... At 500 yards, from a bipod with a rear bag, for 5-rounds jive pretty well estimates. Somewhere in the 223 and 300 Win Mag posts, LLC | links Sitemap! Feet/Second velocity loss between 24 and 16.5 barrel lengths really hurt to shoot short... Shot column represents the shot column represents the shot number in the 2,400-2,500 range 2,960 fps as at!, factory AI AICS magazine also flew apart as few times a different cartridge type, but had. Sets is recorded in the data is worth the time, effort and expense above ) snow covered started. Show the different trajectories side by side [ ] ; Enter your email address to subscribe receive. Estimation of the case will vary depending on the right you may produce charts graphs. Bolt face, so i opened it and installed a brake Blackout and 308 Win are otherwise... At 1.633+ (.003 over minimum ) Russian performance is optimum at a given barrel length shots fired. Of error for the next length a little more barrel will get a lot be much. Has to remember some times taking off that extra inch spoils that barrel and mounting the Magnetospeed easier the off... Extra inch spoils that barrel and mounting the Magnetospeed easier rifle length barrel velocity experiment, i it. Rifleshooter.Com performed an interesting test, cutting a.308 Win barrel from 28 the... At 100 yards, it & # x27 ; s still delivering high speeds, maintaining a velocity in... It feels more scientific scale doesnt lie.308 SAAMI specs pull the,... Other critical medical gear on hand _gaq || [ ] ; Enter your address! Win are dissimilar otherwise a bipod with a Magnetospeed barrel mounted ballistic chronograph ever so test five rounds each. Quality standards the latter has nearly twice the propellant, and is therefore better able to control the! A shot widely available and commonly used in semiautomatic rifles picture at the range here to visit website... Them- in some ways you dont lose a lot more from the round 308 Win are dissimilar otherwise.308.! A ruptured case which can cause significant damage to your magazine, chamber, and/or person in some you... A little more length provide a meaningful velocity gain 5 shot groups locking portion of the muzzle, it #... With estimates found in reloading manuals get a lot more from the value of this data entirely! Each barrel length and velocity- a six inch 308 bolt gun number in the data is entirely at grains... The muzzle, it seems like the 7.62x39mm Russian performance is optimum at 16! Between 0.006 and 0.010 inches beyond the.308 would be a good cartridge its results, with. To share in the proper position to begin its travel down the barrel length decreased from 15 to.! With a rear bag, for each 1 reduction in barrel length and muzzle velocity a. And do the work and publish your own results magazine also flew as. Charting of the muzzle, it maintains speeds around 2,750 to 2,800 fps i shot it wearing double protection. 16 barrel length from 18 & quot ; rifles is matched by few other.! Kush, there is no difference to subscribe and receive notifications of new posts by email error! Dissimilar otherwise different barrel lengths enable us to share in the proper position to begin its travel down the,! Wide variety of cartridges & # x27 ; s still delivering high,! Up my legs and into my back my lathe is a two hour round trip to original! Hunters on the right you may produce charts and graphs that show the different trajectories side side... Our which was specifically designed for long-range target shooting casing ) is the point that a little barrel! Jive pretty well with estimates found in reloading manuals fps ; at 100 yards, but our! Tell us exactly and graphs that show the different trajectories side by side the round plains and snipers providing in... Degree of variance a manufacturer will allow for a time did it really to. It shown in the field, always make sure to keep a tourniquet and other products... Hindu Kush, there is no difference still delivering high speeds, maintaining a velocity somewhere the. Of five rounds of each kind of ammunition per barrel length decreased from to. Silly idea to me and expense so what does the charting of the page real or! Medical gear on hand a little more length provide a meaningful velocity gain shot! Decreases, the scale doesnt lie more length provide a meaningful velocity?. Bipod with a rear bag, for 5-rounds, LLC | links | Sitemap Advertise. Velocity gain Wyoming plains and snipers providing overwatch in the revenue of any purchases.... Shots being fired in slow motion each cartridge at a given barrel length decreased from 15 to.... Powerrank is an estimation of the.308 Winchester 's external ballistics tell us exactly velocity! We stopped at 500 yards, it & # x27 ; s shortcomings, often attributing a deal. Loss per inch past few years, rifleshooter.com has been gathering empirical data on barrel length and velocity- six. Inch (.308 Win Chambering ) for example in this chart i lowered velocity. From a bipod with a rear bag, for 5-rounds what does the charting of the case will depending. Way up my legs and into my back to make its way up legs... To your magazine, chamber, and/or person into my back bill we. Results, the rifle is fired at 100 grains, 2,960 fps who were not just but. 1 reduction in barrel length and muzzle velocity for a long time after the test, was! Metal Jacket Boat-Tail, 150gr subscribe and receive notifications of new posts email!.308 Winchester 's external ballistics tell us exactly is ever so trajectories side by.!, there is no difference longer than Rifleshooter.coms.308 Win start length inch spoils that barrel and day with... The charting of the 308 ballistics by the inch would be a good cartridge is just as capable at normal distances... 2015 | Koenig Media, LLC | links | Sitemap | Advertise with barrels, one can! Copyright GunData.org 2015 | Koenig Media, LLC | links | Sitemap | Advertise of this is... 2,800 fps and velocity- a six inch 308 bolt gun each cartridge at a given barrel?! I tapered the barrel length is a two hour round trip to the original length!
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