The 300 Blackouts recoil is not significantly different from the 5.5645, and its price isnt prohibitively higher. Products manufactured by 80% Arms carry a lifetime warranty against manufacturing defects. The .300 BLK bullets are 0.30 inch in diameter (7.62 mm) and the .223 Rem (5.56 mm) is 0.224 inch. Mission accomplished. The more we all know, the better organized and stronger the shooting and hunting community will be. 300BLK Barrel Length & All Things 300 Blackout Answered The ideal barrel length when hunting with .300 BLK is one able to reach long-range targets with sufficient bullet velocity and energy on target for a lethal impact. Definitive Guide to 300 Blackout Kirsten Provides Some Answers, Horner Wins Tactical-Optics Divison At Multigun Nationals, 300 AAC Blackout Load Data from Sierra Bullets, Scary Stuff .300 Blackout Fired in a .223 Rem Barrel, .300 Blackout Fired in .223 Rem AR Recipe for Disaster. The well-known terminal performance of that Sub-X bullet, however, does make the load an ear-friendly option for some who hunt at relatively short distances. For example, with a 10.5-inch barrel, the .300 Blackout clocks an average velocity of 2200 feet per second. Notify me of follow-up comments by email. It happened that way because when the Russians developed the round, all of their 7.62mm barrel making machinery was built to make 1:10 twist barrels for a bazillion Mosin Nagants and a swag of machine guns in 7.62 x 54R. It gets pretty messy from there. WebSince 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. Heavy subsonic ammo in a 10-inch barrel may have lower velocities, but allows for the use of a suppressor without damaging your hearing. Comparing my 5.56 barrels (18.5, 14.5 and 10.3) is a whole different story. However, heat build up effects point of impact. What happened to it will fire from any AR-15 you might have doesnt appear to be the case since now you say a 9 barrel is optimal but which would require an SBR $200 stamp, you may need an adjustable gas block to handle over gassing & shoot subsonic and then theres the ammo is twice the cost what I pay for my 556 rounds.. My interest in building a 300 AAC for hog hunting that I could just slap in my upper is quickly deteriorating, especially since the gun may not even cycle without, additional hardware if you want to what was promised, which is shoot both supersonic and supersonic through a stock 16 barrel. At a mere 200 yards with a 100 zero, the 300 Blackout drops nearly 5.5 inches more than the 5.56, at 300 yards it drops a whopping 19-inches more. The AAC uses a similar weight and dimensional bullet as a 30BR and 20 inch barrels and longer are the standard for those highly accurate bolt guns. So, I dont know, but its all very interesting to me. COPYRIGHT 2021, THETRUTHABOUTGUNS.COM. Velocities over my 9 AAC barrel are surprisingly mild, about 30-40 FPS for subsonic and about 100 FPS for supersonics. Now its a chicken and egg thing. The accuracy of a .300 Blackout barrel will depend on the exact round and barrel length you use. Factory Starline and SIG produced 300 HAMR cases are available, but cases can be made from common and available 5.56/.223 cases. The end caps on this rifle can be changed as well to mount it on different rifles with different thread pitches, but the stainless steel baffles arent great for full auto fire (they will probably melt). Different calibers reach their highest velocity at different barrel lengths. So you can ball on a budget and just buy the barrel and make the swap when needed-or buy just brand new upper already setup for 300 BLK and throw it on your existing lower. I was at first considering a 9" barrel with a 1:7 rifling, for that is what the cartridge was designed around. Converting an AR-15 to fire 300 Blackout is as simple as swapping its barrel. Since the paperwork and tax didnt kill you, and they already have your fingerprints, youre gonna want to SBR it. Able to suppress all rifle calibers up to and including 300 Winchester Magnum, its perfectly at home on the 300 BLK rifle offering about 40% sound reduction. Greater velocity, if the longer barrel enables such, leads to a farther maximum point blank range. They first looked to the 7.6239 for inspiration. The. Out of a cold unit, you will always have a flyer, usually the first shot. SAAMI creates and publishes industry standards for safety, interchangeability, reliability and quality, as well as coordinates technical data for agencies, enthusiasts and manufacturers. Though the muzzle rise and recoil forces are not entirely negligible, they are not enough to affect follow-up shots for the shooter. We do not recommend choosing a shorter option because the barrel will not be long enough to sufficiently burn gunpowder and provide maximum force to propel the bullet from the muzzle. 4 models Rainier Arms AR Ultramatch MOD2 300BLK Barrel $400.00 Final Sale. 300 Blackout I like loading 300blk with a hand press for some unknown reason..I developed an affinity for the hand press when I was loading for my 460 XVR. Longer barrels are not automatically more accurate. I avoid max loads to increase case life, so speed isnt as important as how accurate the load will shooot. The 300 Blackout is frequently available with 200 and 220 grain bullets. Barrel Length Your longer barrel does add minimal velocity. The muzzle velocity used for 5.56 in the chart is with a 16 barrel, but the 300 BLK is using a 10 barrel. Stay tuned, because we will have more information on them as soon as that information becomes available. Barrel Length This high-speed feature means that the bullet will spend relatively less time in motion and thus less prone to the effects of elements like the wind. One important consideration before you set out to build your AR-15 in the .300 Blackout is knowing the scope of usage of your gun. Versions include FMJ, with or without boattails, open tip match or open tip flat base and cartridges with Hornadys SST V-Max, Sub-X or hollow points. This gives more energy on target, a flatter trajectory and less wind drift. JavaScript seems to be disabled in your browser. TKS! Such large projectiles convey a subsonic muzzle velocity that is accompanied by a quiet report. In my ignorance, I would say its because I want to reduce wear and tear on the suppressor. I completely agree with the SDN-6, I have one too but like everything else, buying a can is a moment in time and you get what you get. A mystique surrounds the .300 BLK (AAC Blackout), and it overshadows this utility players ability to deliver All-Star numbers in a variety of roles. Conversely, its lightweight projectile bleeds energy downrange, the reason Hornady lists it as a target shooting and varmint hunting load. Great! Versions include FMJ, with or without boattails, open tip match or open tip flat base and cartridges with Hornadys SST V-Max, Sub-X or hollow points. It gives an almost negligible muzzle rise while shooting, meaning most of the energy produced during recoil comes back to the shooter's shoulders. Ultimate Guide The companies didnt start completely from scratch, though. The 300 Blackouts .30 caliber bullet can be made especially long, and as the result may weigh up to 220 grains quadruple the weight of the typical 223 Rem rounds. Part of that equation is the use of subsonic loads with heavy bullets and powder that burns completely in that abbreviated barrel. But all things considered, the .300 Blackout will surely deliver whenever it's put to the task. Attaching a 6 suppressor to this barrel length results in a total length of 14 to 16, which provides optimal muzzle velocity for accurate long-range shots. For 5.56 NATO, that point is 20 of barrel. Heck, my Walmart still sells .308 after the evil 5.56 and handgun ammo purge. A 16-inch barrel will provide more velocity to compensate for the weight of the bullet, allowing it to travel further on a flat trajectory. First of all, with 300 BLK, if you are switching from supersonic to subsonic rounds, you might want to be able to quickly make the change from unsuppressed to suppressed. Web5 models Noveske Lo-Pro Gas Block 300 AAC Blackout Barrel (1) As Low As (Save Up to 14%) $351.50 Final Sale. 2) would you build again with the same silencer? Save my name, email, and website in this browser for the next time I comment. A fast burning powder might fully burn in those 9 inch of barrel, but even so, the pressure at the end will still be way higher than it is outside the barrel and hence the accelerating force on the bullet will still be more than friction. Would a shorter barrel make it quieter? Putting a .308-caliber bullet in a .224-diameter barrel is a recipe for disaster. Best Barrel Length For Suppressed 300 Blackout For optimal performance with a suppressed 300 Blackout, we recommend a barrel length of 8-10. As a testament to the efficiency of the .300 AAC Blackout, several military units across the world, including the Netherlands, United Kingdom, and the United States, have adopted it. For 300 AAC Blackout, that point is 9 inches of barrel. If you want a compact package with acceptable performance out of both supersonic and subsonic loads, then 8-10 is a good compromise. Getting away with it because they had deeper pockets (costs a lot to get SAAMI cert) and Remington Defense backing. By design, the 300BLK just doesnt give up that much velocity until you get down below 9-10 of barrel using factory ammo. Perfect for integral suppressor or just using as an SBR/pistol. 300 BLK was a way to achieve similar ballistics as the .308- with the least modifications to your 5.56. The powder needs not only fully burn, but also the products of said burning need to drop in pressure, before you start seeing a decrease in velocity. Exactly what Int19h (?) Barrel Length For those who need to run a .30-caliber cartridge from a standard AR15 platform (as opposed to the AR10), the 300 AAC Blackout makes sense. Ballistically, the .300 AAC Blackout has almost 17% more energy at 300 meters than the 7.62 x 39 round. The military roots still show in the selection subsonic loads, although its neighborly friendly to ditch that familiar crack as the bullet breaks the sound barrierwhether its quieted at the muzzle by a suppressor, or not. In theory, a longer barrel offers more room for bullet expulsion. 300 Blackout SAAMI Cartridge Specification. Maybe he purchased them for a few hundred dollars prior to 1986 or inherited them from someone who purchased them for a few hundred dollars prior to 1986. However, a 20+ inches barrel may be too unwieldy and impractical for anything but target shooting.
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