308 20 Inch Barrel Ballistics

Ballistic Trajectory Calculator. 260 provides much less wind drift and drop than. 308 Win rifles. 5 Creedmoor Magnetic Particle Inspected Manufacturer: Ballistic Advantage Premium Series QPQ Nitride Finish Tactical. 5s are great, but short barrels don't do them any favors. com performed an interesting test, cutting a. 308 ammunition manufacturers on one easy to read chart. 62mm x 51mm carbine / assault / sniper rifle that has been chosen by SOCOM to evenbtually replace a number of existing weapons used by US Special Operations Forces (SOF). 300 AAC Blackout is typically chambered in platforms with barrel lengths ranging from 7” to 16”. 20" Ballistic Advantage Modern Barrel, 308 Win/7. ) After nearly a decade of instructing police and military students in counter-sniping and precision shooting, I've amassed a useful variety of. Now in full disclosure I have to adjust my powder charge but the point is I didn't loose a thing. Winchester Model 94 lever action, 24-inch barrel. LaRue Tactical 6. I used Remington ammo for the preset buttons only because the ballistics were easy to find on the web. Accuracy and terminal performance are the cornerstones of Hornady ® Precision Hunter ® factory loaded ammunition. The first question is overall rifle weight. I grew up with a Remington model 7. When I was a little kid learning guns in the 1950s, my dad explained why the family gun rack contained shotguns (all 12-gauge) with different barrel lengths. 308 Match ballistic data, which has been further refined and developed for inclusion in a new textbook, "The Ultimate. Shop our big selection of AR-10 / LR 308 Rifle Barrels. 62×51mm NATO T65. I clock 55 grainers at just a tad over 3320. Go Ballistic Firearms 308 or 6. 308 cartridge reaches peak efficiency beginning with barrel lengths of 20 inches or longer. 308 continue our fantastic barrel-making with a bit more punch. A 24" barrel will get you to 1,000 yards. Ballistic Advantage is a manufacturer of quality high-end AR rifle barrels and other firearm replacement parts and accessories with expertise in AR 15 Barrels. This calculator will produce a ballistic trajectory chart that shows the bullet drop, bullet energy, windage, and velocity. Keep in mind you have a 1:10 twist. Compare the above rates of loss to those found in 308 Winchester / 7. That being said I would go with the 20" barrel. Dave Emary, the ballistics wizard who developed Hornady's LeverEvolution rounds, says: "We've used proprietary means to alter propellants in the Ruger Compact Magnums, tightening their pressure curves. short barrel length is negligible for most hunting distances, generally distances below 350 yards; Furthermore, "a. 308 AR rifles with a rifle-length gas system, includes barrel extension. Also I am being very optimistic on only a 200 FPS loss of velocity. I have a 16 1/2 inch Ruger 77 Compact in. Large diameter Lapua parent case. After initially going with the 20-inch barrel for their Tango 51s, the Los Angeles County Sheriff's Department has decided to go with the 18-inch barrel and Tac Ops 30 suppressor on all new Tango 51s that they purchase. 16 inch barrel vs 18 inch. All, I've been shooting 16-20". General Trajectory Calculators Trajectory Calculates the trajectory from bullet BC and firearm info. best bullet for 308 with 20 inch barrel and 1 in 10 twist. 300 WSM in standard 24-inch barrels, but it beats the WSM in 20-inch tubes. As is almost always the case, shorter barrels lose 35fps per inch of barrel removed. Buy Proof Research Barrels from Evolved Ballistics. The gun is offered with either a 20, 22, or 24 inch barrel, depending upon caliber selected. 20" seems to be ideal for the 7/08 and the 308. This rifle started it all for DPMS and ushered in a new era of AR performance. 5s are great, but short barrels don't do them any favors. This is the same thing as regular GM308M but packed in 500 round cases not 200 round cases. A B&L 6-24X scope was installed in Sako mounts. 308 WIN Heavy Fluted Match Series AR10 Barrel Ballistic Advantage. 308 AR match grade barrels are designed for DPMS, Remington, Bushmaster, and FA pattern rifles. In this cartridge comparison, we are going to examine two cartridges that behave very similar in the ballistics category. 308 in practical barrel lengths. This barrel has a nitride finish for increased strength and durability. 308 AR rifles with a rifle-length gas system, includes barrel extension. Looking at picking up the Tikka T3X Tac A1 in 308, was leaning toward the 20 inch barrel unless there is a major advantage with the 24 inch barrel, would either be fine at 1000 yards? It looks like the FPS difference is about 50-75fps from the charts I could find. Got A Question call. AR-15 Rifle Length Gas system. The Long Ranger wears a twenty-inch tapered barrel. I used Remington ammo for the preset buttons only because the ballistics were easy to find on the web. 5/8-24 threaded muzzle. Anyone got experience I can lean on here? I will either use Adi powders or Winchester. Most hunters would be well served with a 16″ or shorter barrel. 308 AR-10 Barrel. 308 due to performance consistency. 308 Big Gunner profile barrels are the big-brother to our famous 5. 308 that has a 22" barrel that I was considering having cut down to 20" to make it a little more compact. Test Barrel Lost 22. My question is this: how much difference is there between the two barrel lengths? And I'm not just talking about ballistics, but also about the suitability of the guns. I guess I need to go chronograph five rounds of it at 18" and maybe shoot a few from my M1A with a 22" barrel so I can get a trend reading. This little fellow is an interesting choice and will allow you to maintain a compact rifle when using something like a suppressor. After that, expect another 25-30fps extra velocity for each added inch up to about 28". What would the drop be at exactly 200 yards in perfect conditons with a 20 inch barrel SPS Tactical, firing a 168 grain Winchester Ballistic Silvertip. The 20-inch, medium-contour barrel on my test rifle was cold-hammer forged from 4140 chrome-moly steel with a 1-in-10-inch twist rate. Shop our big selection of AR-10 / LR 308 Rifle Barrels. 308 WIN Big Gunner AR10 Barrel. Great care has been given by Hornady engineers to develop superior, match­-accurate hunting loads that allow the ELD­-X ® bullet to achieve its maximum. If you are talking about velocity--you can count on losing about 10-20 feet per second per inch when going from a longer to a shorter barrel. We used Federal brass and Federal 205M primers in all the following loads. Both of which are. If you got a. It's a state of mind. Accuracy and terminal performance are the cornerstones of Hornady ® Precision Hunter ® factory loaded ammunition. The rifle is a hunting rifle, through and through. 308 "Thumper" Subsonic ammo. This is a discussion on Difference In 16" To 20" Barrel within the Modern M14 forums, part of the M14 M1A Forum category; I'm very curious as to what the ballistic differences are in a 16" -20" barrel on an M14. 20" Ballistic Advantage Modern Barrel, 308 Win/7. Mil-spec parts - American made. Im looking to build a long range rifle. 308 in 20 to 22"" barrels. Used my oldest son's. 308 Ballistics Chart & Coefficient Article Posted: July 10, 2012 The following is a 1000 yard. Shooting a 123-grain Lapua Scenar with a ballistic coefficient of. up close and passes the 308 in ballistics and trajectory at 500 yards. So we know good barrels and that's the only kind we offer to our LR-308 customers 6. 9 feet/second per inch of. When cutting a 308 Winchester barrel from 26″ to 20″, he claims a gunsmith “found that a 20-inch barrel provides for a complete propellant burn and no velocity loss when using Federal Match 168-grain BTHP”. I suspect that's mostly due to harmonics and the longer barrels being a bit too light contoured for there length. 308 Win 20-inch 10Rd 18004 from all vendors. 61 inches high at 100 yards for a 230 yard zero. 56 and 223 Rem does not do well from extremely short barrels, velocities from 16″ and 20″ barrels are quite fast at times. 308 ammunition manufacturers on one easy to read chart. Its monolithic upper receiver is machined from 7000-series aluminum, including a full-length M1913 Picatinny top rail with built-in taper for long range precision. 56 chambered 20 inch Modern Series Barrel is machined from 4150 Chrome Moly Vanadium steel with a QPQ Corrosion Resistant Finish and QPQ coated M4 feed ramp extension. with a 26" barrel. Ballistic Advantage's propietary "Hanson" profile is unique in the barrel market. Going down to a 12-inch barrel only loses another 83 fps, while a 10. Most people have no business shooting over 300 yards because the WIND is too much of a factor to reliably put the bullet where it should go. Are you a GunSmith or Armourer ? Click here for the GunSmith Clear. 308 chambered 20 inch barrel is machined from 416R Stainless Steel with a bead blasted finish. Many price points for great affordable value. Discreet Ballistics gives its customers the option of choosing these loads for use in 16″ barrels or 7-11” barrels. Shop for the LR 308 20 Inch 6. 308 chambered (DPMS style) 20 inch barrel is machined from 416R Stainless Steel with a bead blasted finish. PSA Gen2 PA-10 20" Rifle Length. I am talking about maybe 600 yards tops for the kind of shooting that I do. In cartridges that have "overbore" chambers, (larger than normal capacity for a given bore size), a slower burning powder is a must to keep peak pressure below the danger level. Brass Fetcher Ballistic Testing. Barrel Length. Barrel length effects velocity, not accuracy, and twist rate has more of an influence on what bullets the barrel likes to play with. 308 Winchester, building a rifle in. Velocities were determined using 24-inch barrels; shorter barrels will reduce velocity by 30 to 85 fps per inch of barrel removed. The Long Ranger wears a twenty-inch tapered barrel. - 1 in 9 1/4". 308 AR rifles with a rifle-length gas system, includes barrel extension. I clock 55 grainers at just a tad over 3320. Our superb. Gold Medal Sierra MatchKing Part #: GM308M. Right at 3000 fps and will. If you got a. 280 AI’s additional case capacity does good things, but it doesn’t change laws of physics. Building off the success of our highly-accurate and reliable OBR 7. 300 RCM: want real. Our Premium Series Barrels are HP and MPI tested, ensuring the best in quality and accuracy. The DPMS Oracle 308 review talks of a gun that features a 16-inch compact barrel length design. - 1 in 9 1/2". I'm looking at a build from Sniper Central. Driven by the spirit of innovation that began more than 38 years ago, Bushmaster offers cutting-edge MSR technology for America's competitors, hunters and recreational shooters. My question is this will a 20 inch barrel get me to my goal or should I be looking for a 24 or 26 in barrel. 308 FMJ will fragment at even 5 yards, what little I've seen and recall implied something like 2700 fps was needed to fragment an FMJ. The MK 17 comes in 3 flavors - the Standard, with 16 inch barrel, the CQC with a 13 inch barrel and the LB with a 20 inch barrel. set zero at 345 yards. a 22 or 24 inch barrel in regards to decreased accuracy and loss of velocity?. 308 Win uses a 16-inch S2W (Strength-to-Weight) barrel with a 1:11 twist. I chose an 18″ barrel on my 6. Theoretically, if one's headspace were to fall in this region it would be safe to shoot. Test Barrel Lost 22. External ballistics deals with the performance of Hornady bullets from the moment they exit the barrel until the moment they arrive at the target. PA-10 308 with a 20" Ballistic Advantage Premium Series barrel My home built Palmetto State Armory 308 with a Ballistic Advantage barrel Ballistic Advantage Basic Barrel Install. velocity fps 3400 3285 3174 2960 2756 2561 2368 2183 1506. I have a 24″ version and muzzle velocities aren’t appreciably higher than what is claimed for a 20 inch barrel. The Ballistic Advantage 12. Long range isn't just a distance. We've updated our previous Medium-Taper profile taking into account customer feedback, optimizing the barrel to meet the Gunner brand's high standards. set zero at 345 yards. 308 Winchester ammunition ballistics Chart. 308 barrel presents a fairly uniform diameter, this gives you the luxury of quite a number of choices for which handguard to use. The finish doesn't look like blueing, having a darker tint. 70P in 7mm Rem. 7 models Ballistic Advantage Premium Series. Ballistic Advantage is a manufacturer of quality high-end AR rifle barrels and other firearm replacement parts and accessories with expertise in AR 15 Barrels. The barrel you choose is one of the most important decisions to make when building a gun. Considering these facts, IMO it's a substantial mistake to plan for 20-inch ballistics. The DPMS Oracle 308 review talks of a gun that features a 16-inch compact barrel length design. S ability to approve larger 300 ultra mag ballistics at a 1000 guarantees for across the northern hills vast amounts of revenue. How Much More Velocity Will I Get with a Longer Barrel? Going from 20" to 24" can increase velocities up to 160fps (40fps per added inch), depending on the rifling. 223 ballistic test carbine vs SBR. So for our ballistic gel tests, we wanted to test each load with both of the two most common barrel lengths for defensive revolvers, which are 2-inch and 4-inch. The MK 17 Mod 0 SCAR-H is a 7. Use this ballistic calculator in order to calculate the flight path of a bullet given the shooting parameters that meet your conditions. 62x51mm NATO and ready to install on an upper receiver. I have multiple powers in the reloading room - Varget, Winchester 748, IMR 4895, IMR 3031, IMR 4064, Hodgon H414, and Accurate XMR2015. 288 for the 90gr Sierra and a real-world muzzle velocity of 2600-which is what you're going to get out of 18-20 inch barrels, unless you want to lug around a 28″ or 30″ Palma barreled bolt gun to use the new lightweight. 308 Tactical Government Carbine AR-10 Barrel. 308 Win 178 gr ELD-X ® Precision Hunter ® Item #80994 | 20/Box. I have an AR15 that the barrel has finally reached the end of it's life. "The Grendel runs about 15 fps per inch from 20 to 28 inches or about 120 fps. My Hanson barrel is a 16 inch, 1/8 twist, bead blasted, 416R stainless steel, 5. 2 groups, the rest is the is up to the activator nut. This twist rate is meant to handle the heaviest of bullets. 7 inch groups out of both of my testing rifles with 18-inch barrel. Shop AR 308 Barrels -. 308 is one of our more efficient cartridges. We used Federal brass and Federal 205M primers in all the following loads. 30-30 (thirty-thirty), as it is most commonly known, was the USA's first small-bore, sporting rifle cartridge designed for smokeless powder. Ballistic Advantage is a manufacturer of quality high-end AR rifle barrels and other firearm replacement parts and accessories with expertise in AR 15 Barrels. Velocities were determined using 24-inch barrels; shorter barrels will reduce velocity by 30 to 85 fps per inch of barrel removed. This is my fist post. 308 Match ballistic data, which has been further refined and developed for inclusion in a new textbook, "The Ultimate. and a 270 Weatherby Magnum both with 24" barrels? I've been thinking of getting a 270 Weatherby for all-around hunting in North America and maybe Plains Game in Africa. 308 = 20" Different powder and bullets can change this but these barrel lengths seem legitimate. 308 Win Barrel Cut-Down Test: Velocity vs. Ballistic Advantage's propietary "Hanson" profile is unique in the barrel market. KM Tactical is a gun parts and tactical gear distributor with a vast inventory at the cheapest prices. 308 is pretty nonchalant about barrel length, and you are only losing something on the order of 20FPS per inch of barrel lengthso the difference between 20" and 24" is going to be 80-100 fps. The muzzle blast from these cartridges in a 20 inch barrel is less severe than from the larger, high intensity cartridges in a 22 inch barrel. To demonstrate the Grendel's accuracy I put my Alexander Arms 20-inch GDMR (on which I replaced the stock barrel with a fluted Satern match barrel with cut rifling and a 1:8. 308 cartridge reaches peak efficiency beginning with barrel lengths of 20 inches or longer. 308 DPMS 20″ Rifle Length Heavy Profile Premium Series Stainless Steel Barrel. 308 that has a 22" barrel that I was considering having cut down to 20" to make it a little more compact. I used Remington ammo for the preset buttons only because the ballistics were easy to find on the web. 308 FMJ will fragment at even 5 yards, what little I've seen and recall implied something like 2700 fps was needed to fragment an FMJ. 308 chambered (DPMS style) 16 inch barrel is machined from 416R Stainless Steel with a bead blasted finish. Chambering includes 223 Remington and 308 Win. 11° target crown. Custom-grade accuracy is now within reach of virtually every hunter. The Ballistic Advantage Modern Series. 308 with a 22" barrel is capable of taking elk out to 300 yards. Because encouraging their unequalled conception, transformed furthermore at this point accommodated not any in excess of alone. I suspect that's mostly due to harmonics and the longer barrels being a bit too light contoured for there length. So what changed? New factory test barrels maybe? Just FYI, according to SAAMI data I researched years ago, reducing barrel lengths for ammo in the 308 Win velocity range affected velocity by approximately, 20 fps per inch. And even took a caribou at 330 yards and one at around 400 yards. EBR has 308 Subsonic ammo including. 5" barrel and 1:10 twist. This barrel has been machined from 4150 Chrome Moly Vanadium with tight tolerances. 308 in 20 to 22"" barrels. 308 was loaded with Win 748 ball powder which optimized performance in shorter barrel lengths. 308 Winchester is a rimless, bottlenecked rifle cartridge and is the commercial cartridge from which the 7. Large Selection from the most well known and trusted AR-15 and AR-10 Barrels on the market at the best Prices available. We are a full service manufacturing group, call us with your needs for Solidworks design, CNC progrmming, CNC manufacturing, and CNC equipment. This listing is for Barrel Only!!! NO Bolt - Bolt available as Option 6. My question is which is the optimal barrel length for the 308? I was thinking of having it cut down and recrowned at 20-22". 308 FMJ will fragment at even 5 yards, what little I've seen and recall implied something like 2700 fps was needed to fragment an FMJ. With barrels, one wonders "Can a little more length provide a meaningful velocity gain?" To answer that question, Rifleshooter. Our Premium Series Barrels are HP and MPI tested, ensuring the best in quality and accuracy. 4" at 100 yards. Shop M5E1 20". 497 BC) and 143gr Hornady ELD-X (. 308 Winchester. Comparing bullet speeds out of a long, a medium and a short barrel rifle. Large diameter Lapua parent case. With an 8 inch barrel you can expect to find a good bit of unburnt powder left in the barrel and more powder residue in the chamber. How Does Barrel Length on a Shotgun Affect Velocity? Tweet I did a test last week where we shot an old Marlin Goose Gun with a 36 inch barrel and compared it to other shotguns with shorter barrels but with the same chokes. That works out to an average loss of 22. 288 for the 90gr Sierra and a real-world muzzle velocity of 2600-which is what you're going to get out of 18-20 inch barrels, unless you want to lug around a 28″ or 30″ Palma barreled bolt gun to use the new lightweight. It had a 1 in 10 twist Interarms barrel screwed on it For some reason mine was not accurate with the mis range bullets, but it would shoot 200 grain Speers into one hole. We've updated our previous Medium-Taper profile taking into account customer feedback, optimizing the barrel to meet the Gunner brand's high standards. 5 Creedmoor is the better ballistic cartridge than. 308 Winchester Modern Series 20". 5 grendel with a 22 inch barrel. 308 168gr match into. The editor considers Dan Lilja one of the most knowledgeable of today’s authorities on long range rifle shooting. Point blank range is at 272 yards". Meaning of course that the 20 inch 35 Remington barrels compared to the 20 inch 30- 30 barrelswith all else being equalyou can get higher velocities from the 35 Remington Marlins with the same bullet weight. 308 chambered (DPMS style) 18 inch barrel is machined from 416R Stainless Steel with a bead blasted finish. 270, most likely you got a 22-inch barrel. The first question is overall rifle weight. This calculator will produce a ballistic trajectory chart that shows the bullet drop, bullet energy, windage, and velocity. The popular Rem 700 LTR (Light Tactical Rifle) features a 20″ fluted barrel. 308 Win Barrels. 308 win which has a 20" barrel. At Christensen Arms, excellence is in our blood, and perfection is what we strive for. I chose an 18″ barrel on my 6. 308 "Reaper" Subsonic Expanders,. LaRue Tactical 20" OBR 5. 00 Save 12%. 308 Winchester to increase carrying ease and maneuverability. Because of the larger bore and the better expansion ratio of the 35 caliberyou lose less velocity, with every inch less of barrel. Shop M5E1 20". What would the drop be at exactly 200 yards in perfect conditons with a 20 inch barrel SPS Tactical, firing a 168 grain Winchester Ballistic Silvertip. 5″) Introduction. Even with heavy bullets, one can expect 5. Barrel length really is more dependent on use. When cutting a 308 Winchester barrel from 26″ to 20″, he claims a gunsmith “found that a 20-inch barrel provides for a complete propellant burn and no velocity loss when using Federal Match 168-grain BTHP”. 5/8-24 threaded muzzle. 308 CMV Complete Upper Receiver and more online at aeroprecisionusa. My newest steel barrel to test is the Ballistic Advantage SPR profile 16 inch Mid Length. Welcome to Ballistics By The Inch, or 'BBTI' as people have taken to calling it. set zero at 345 yards. 308 WIN 16 Inch 18 Inch 416R Stainless Steel Ballistic Advantage Barrel Length: 18 Inch Barrel Length: 20 Inch Barrel Length: 22 Inch Caliber:. That being said I would go with the 20" barrel. 5# Two stage match trigger & Black Ergo pistol grip, Chrome carrier, Flat top Tri Rail receiver & Port door & 4 rail carbine free float tube. I'd like to make a ballistic card using jbm, but don't have a chrono to take the muzzle velocity for 168 SMK rounds. com performed an interesting test, cutting a. 925 Muzzle Target crowned or Optional Threaded 5/8x24. 62x51mm NATO: Barrel Length versus Velocity (28″ to 16. my subreddits. 308 for shooting out to 600 yards. 5 creedmoor H- BAR 1-8 TWIST BARREL 20 INCH #DP200. The cuts were made in one-inch intervals with a rotary saw. 260 can be as easy as fitting a new barrel. 7 X 64 BRENNEKE. Combine a high intensity cartridge with a 20 inch barrel and the velocity drops sharply, while the muzzle blast becomes annoying. If your needs involve longer range shots, government profile AR-10 barrels are available in match grade quality that allows the weapon a higher degree of accuracy. I happen to have an 18" 600 Remington in 308 and a quantity of Fed. from 18" to 20" on a 7/08 I gained almost 200 ft/sec. 308 Caliber AR Upper Assemblies - AR15 Parts and Accessories 308 AR Kits & Parts BELOW COST SPECIALS!!!! 1911 Pistol Slides, 45 ACP. 62×51mm NATO T65. Chambered in. 280 AI’s additional case capacity does good things, but it doesn’t change laws of physics. The DPMS cost $45 regularly but with the current shortage of gun parts they are being sold online and at gun shows for $70. Not much point in a 36″ barrel. set zero at 345 yards. DTT Customs "Pike" LR-308 Featuring Aero Precision M5 Upper 20". Plaster, USAR (Ret. With barrels, one wonders "Can a little more length provide a meaningful velocity gain?" To answer that question, Rifleshooter. 308 has a lot more. Weatherby Mark V (present) 7mm Weatherby Mag. PSA Gen2 PA-10 20" Rifle Length. 308 AR-10 Barrel. 30-30 Winchester from a comparable barrel length. Blackthorne Products :. This year the fall color is about as good as it ever gets at ATOTT Headquarters. This barrel offers a 1:10 twist rate, that is excellent for accuracy with various bullets. This is a discussion on Recommended bullet weight for. 308 (Winchester) 168-grain BTHP Match round will impact 6 inches lower at 500 yards when fired from a 20 inch barrel than when fired from a 24 inch barrel” [6]. A dedication to push further. Distances have ranged from 20 yards (bobcat) to 205 yards (hog) with most taken at night. 62x51mm NATO), the 308 Winchester has gained universal acceptance amongst shooters of all types. You can figure 25-50 FPS loss per inch of barrel. Premium Series Barrels are HP and MPI tested, ensuring the best in quality and accuracy. 308 "Reaper" Subsonic Expanders,. Without machining a "shoulder" (a steep drop or angle cut into the outer diameter of the barrel,) Ballistic Advantage Hanson barrels symmetrically limit barrel whip. 308 is the ideal countersniper caliber, again the question is what for. The barrel comes without sights, and has a thin sporter taper. The QPQ coating ensures corrosion will not occur. 45×39 barrels are some of the nicest you’ll find anywhere, are very accurate and are machined from 4150 Chrome Moly Vanadium steel with a QPQ Corrosion Resistant Finish. If barrel length did not matter then a 2. short barrel length is negligible for most hunting distances, generally distances below 350 yards; Furthermore, “a. Recommended bullet weight for. For many years, these have made challenging targets for shooters wanting to test both their equipment and their skill at longer than normal ranges. 70P in 7mm Rem. Complete 44 magnum ammunition ballistics Chart. He started with a 26″ barrel, because that is what Surgeon typically used but lately we've been shooting in more practical/tactical long-range competitions where you have to carry the rifle for. 308 Winchester to increase carrying ease and maneuverability. Caliber : 308 Win Barrel Length: 18" Twist: 1-11 Thread: ⅝ x 24 Gas Tube: Rifle Length Barrel Diameter: 30mm/ 1. Barrel Length & Twist Rate You’ll see a wide range of barrel lengths and twist rates on precision. 308 barrel or an AR-10 18-inch barrel, Ballistic Advantage has a Government Profile AR-10 Tactical Barrel that will suit your build. 308 continue our fantastic barrel-making with a bit more punch. If you are talking about velocity--you can count on losing about 10-20 feet per second per inch when going from a longer to a shorter barrel. I grew up with a Remington model 7. This listing is for Barrel Only!!! NO Bolt - Bolt available as Option 6. 308? I missed a shot on a good buck on my hunting trip at about exactly 200 yards (used a range finder). It’s built for tack-driving accuracy with a 20" heavy-contour tactical-style barrel and dual-point pillar bedding in its black synthetic stock. We are not concerned with internal ballistics, the province of the firearms engineer or powder chemist, nor with terminal ballistics, the province of the forensic pathologist or other scientific. 70P in 7mm Rem. In fact the bullet drop and performance is about the same as for the. 750"x 20" plus Quiet muzzle brake. My newest steel barrel to test is the Ballistic Advantage SPR profile 16 inch Mid Length. hpbt matchking point blank range computed for 5. velocity fps 3400 3285 3174 2960 2756 2561 2368 2183 1506. I have been working on a a few projects for Barnes Precision Machine, one of which was a ballistic test for a common barrel length for SBR and compare that to the AR-15 carbine 16″ barrel. DPMS LR-308 C-Products. The Grendel has a strong advantage over. I am noticing that besides shortening the stocks most manufacturers also slice a couple of inches of the barrel.