Now that you know the best barrel length for .300 Blackout ammo, you only need to find where to buy a barrel that fits your needs. Lastly, barrel length affects a bullets twist rate how much a bullet spins within the barrel when fired. Heavy grain subsonic bullets are barely able to retain true subsonic performance. A successful hunt requires sneaking up on a target until you're close enough to take a clean and fatal shot. Thats the one, and only reason Im so anal about checking mine on the range, or in the field. It seemed to work OK for all those years. The SAAMI diagram for the 300 BLK is shown below. 300 Blackout Ballistics This means the .300 Blackout is more effective at long distances. WebAt 200 yd (183 m), the 300 BLK drops 2 in (51 mm) lower than the 6.8 SPC, while it drops 30 in (760 mm) lower at 500 yd (457 m). Have been shooting 300 for a few years now. Really -- the largest difference is 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. I did 100 rounds a night for 6 nights. Heavy subsonic ammo in a 10-inch barrel may have lower velocities, but allows for the use of a suppressor without damaging your hearing. A subsonic 300 Blackout round produces comparatively little muzzle flash in addition to a softer report, making it a fine choice for hunting in nighttime and twilight conditions. The stiffer barrel damps harmonics. Important correction Mr. Leghorn: the SilencerCo Harvester suppressor provides about 30 dB of suppression according to your graphic, not 40%. A fast attach lets me do that. 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. Be first to know about promotions and new product launches. As for silencers, theres some competition out there. Remington Defense was part of the effort, which was no easy task because it included a requirement that it run in standard AR-15 magazines. Longer barrels also screw up the timing, 16 with carbine gas is on the outside fringe of reliable for the 300. The thing functions with everythingfrom 125 grain Sierra with 17 grains of Lil Gun to 220 grain Hornady with 10.5 of AA 1680. One thing is true your bullet accelerates until it either runs out of fuel or leaves the barrel (technically, youll start losing velocity before all the powder burns as a portion of the energy is used to overcome the friction of the barrel itself). It gives an almost negligible muzzle rise while shooting, meaning most of the energy produced during recoil comes back to the shooter's shoulders. Been there, done that. 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. Muzzle Velocity: 2,259 fps. Supersonic ammo out of a 10-inch barrel retains rifle caliber velocities, but with more significant bullet drop at longer distances. ), while others may be better in 8 or 10 barrels. BBTI - Ballistics by the Inch :: Home Saying things like at 10, the muzzle velocity hasnt yet reached its peak is misleading when youve got a cartridge with a wide swing of bullet weights and charge weights. Supersonic ammo retains rifle caliber velocities, has increased effective distance, and bullet drop is greatly reduced. 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. OUR GST-9 IS UNAFFECTED BY THE LATEST 12/28 ATF CLARIFICATION LETTER & SHIPS IN 3 DAYS! These loads are heavier than most rounds and feature an adjusted powder charge that delivers peak bullet velocity by combusting completely within short barrels. They designed it for the needs of Special Forces to be real compact (as an Mp-5) and QUIETER than an MP-5. However, if you want the best barrel length for .300 Blackout home defense, we recommend not going shorter than 6 to 8 inches. Whether youre hunting, defending your home, or just shooting suppressed at the range, 300 Blackout is a popular and adaptable cartridge. The deer Ive taken with my 8 300 BO dont know or care. but horrible reviews on Trustpilot? In a tactical situation, I can see the reason for keeping it attached, but at the range, supersonic ammo is not going to be ear safe with or without a suppressor. 5.56 pistols from 8 & 9 barrels blow fireballs out of the barrel. I have a 762-SDN-6 suppressor on a 300 BLK rifle I built with a 16 barrel shooting subsonic 220gr ammo but I dont get the tick, tick, tick when shooting. Since suppressors are verboten in CA, I shoot 120g supersonic. Barrel twist rate also impacts performance and should be considered when selecting barrel length and determining the effective range of the 300 Blackout. Nothing further than that is as effective since the gunpowder burning would be inefficient in the spare room. Bullet drop is calculable, though, so that should really fall under marksmanship, as opposed to intrinsic accuracy of the rifle? One has operated perfectly right out of the box. Have had a LOT of different ARs including a Colt upper in 7.6239 that I killed my first deer with! Mine has a 10. Cartridge Overall Length: 2.02 inches. I need you to read this test by The SIlencer Shop that shows the SDN can at an enormous disadvantage when shot with 300 BO subs. Heavy, slow moving subsonic bullets experience more bullet drop than fast, more aerodynamic bullets. At this point, you should use internal ballistic calculation tools to match your selected variable to the other. There is no real difference in muzzle blast from either, both rifles use identical Surefire brakes. agreed on this. Ask Foghorn: What Barrel Length for a 300 AAC Blackout Rifle? This isnt that hard. Suppressors minimize the chances of a sniper being located by sound, but they simply reduce audible emissions from their firearms muzzle end, not a projectiles characteristic crack. To avoid it from giving a shooters position, subsonic .300 BLK loads use heavier bullets and adjusted powder chargesoften tailored for a complete burn in a short barrel. With a warm barrel/suppressor unit, it is possible to shoot impressive groups. Heavy, expensive, and absolutely fantastic. http://thetruthaboutguns.com/author/foghorn/, Illinois Freedom Week Starts Today: Federal Court Blocks Enforcement of Illinois Assault Weapons Ban. 1:8 or increasingly, 1:7, especially if you want to stabilize subsonic, LONG bullets at low temperatures. Sure, you could just leave the suppressor attached, but Id rather not have it see the wear and tear if it doesnt need to. said. Thats 8 inches of barrel for the 300 BLK 1-8. var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s); A very hot load in 300BLK I use is 120gr Nosler BTHP with 21.0Gr H110. I know thats a long discussion, but Im primarily wanting close range tactics with a very short barrel (likely 9). Getting away with it because they had deeper pockets (costs a lot to get SAAMI cert) and Remington Defense backing. Converting an AR-15 to fire 300 Blackout is as simple as swapping its barrel. Let your fellow shooters know share this article using the Facebook, The only thing that barrel length gets you is velocity the longer the bullet is in the barrel and being pushed by the expanding gasses of burning gunpowder, the faster that projectile will be going. One for the M16 regardless of barrel length. A more rigid barrel is better. Plus higher velocity typically requires less hold over. I have 2 Colt M-16s that Im going to convert to 300 Blackout. Armed forces in the U.K., U.S., and other countries use .300 Blackout because its stopping power and suitability for close combat are undeniable. They had a 1.5 star rating 3 years ago. That coupled with your complaints is why. They straight stole J.D. Barrel Length You have entered an incorrect email address! 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). FBI: Crime Rate Dropped During 2013, Year of Record Gun Sales. That number comes from multiple conversations with the people who designed the 300 AAC Blackout cartridge, did the initial testing, and who continue to design guns around that caliber. For varmint hunters, competitors and gun owners practicing at distance, supersonic .300 BLKs are big medicine. The fastertwist rate is perfect for the 220 grain ballistic monsters that subsonic 300 BLK ammunition use, but for the lighter hunting rounds (like Barnes 110gr round) not so much. However, this maximum effective length is determined by the barrel's length, and the 460-meter distance is achieved by a nine-inch barrel. })(); To comment on a post, click Post Title or "Comment" Link. Let's find out! The .300 AAC Blackout is designed as a variation of the older .300 Whisper ammunition. A buddy has a 100yd range in his back yard. Although functionally identical to the 300 Whisper, the 300 AAC Blackout is its own SAAMI standardized cartridge. Affordable Factory 300 BLK Ammo is Available vs 300 Blackout (with ballistics charts 300 HAM'R Here is the old barrel length again Longer barrels have been proven to have better velocities and it depends on your burn rate on your powder whether you get the full use of your barrel. John McClain, *Competitive Shooter of the Week* Gun Review: Henry U.S. The .300 BLK bullets are 0.30 inch in diameter (7.62 mm) and the .223 Rem (5.56 mm) is 0.224 inch. Ive not shot it w/o the can. 300 Blackout WAS stolen from 300 Whisper. Flash can under the handguard is sexy and with a 10-inch 300 Win mag rated can is 35.5 inches OAL Always thought of the 300 as a niche caliber, but Im good with that. 3. Speared on by no issues I built a 10.5 inch pistol with an arm brace LOL. It probably worked loose after multiple shots, and somebody forgot to tighten it back up. It didnt take long for engineers at two of the industrys finest to solve the problem, though. 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. The shortest .300 Blackout barrel we have in stock is the 6-inch barrel. This type of software isnt free, but as a one-time purchase its probably the best reloading tool you can get for the price and pays for itself quickly given the price of reloading components youll save.

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