The same holds true for bullet drop: Subsonic 300 Blackout outperforms 5.56 NATO by offering the same bullet drop from muzzle to 700 yards while affording over twice the kinetic energy. We can see right away that subsonic 300 Blackout out-shines 5.56 NATO, maintaining higher velocity and energy the moment it leaves the muzzle, all the way out to 700 yards. Let's compare performance against those heavy sub loads. While 5.56 NATO enjoys a slight edge in this case, the benefit of 300 Blackout is the ability to swap out supersonic for subsonic loads without re-configuring your rifle. Bullet Drop & Wind Drift (9" Barrel, Supersonic)īoth 5.56 NATO loads also provide slightly greater resistance to wind drift and bullet drop when compared to supersonic 300 Blackout. We see that 5.56 NATO offers slightly greater muzzle velocity (around 400-500 FPS) than supersonic 300 Blackout, while offering decreased muzzle energy. Velocity & Energy (9" Barrel, Supersonic)
We recorded velocity, energy, wind drift, and bullet drop of both supersonic and subsonic 300 BLK against two of the most common 5.56 cartridges: The M855A1 (62-grain) standard ball round and MK-262 (77-grain), a popular match-grade round favored by SF operators overseas. The ballistics data shown below was recorded using a 9-inch barrel (we'll explain optimal barrel length, twist rate, gas, and everything else next). When configured correctly, 300 BLK provides ballistic performance with "stopping power" similar to 7.62x39mm with a max distance comparable to 5.56 NATO. Modern shooters compare its ballistic performance to the common rifle round. Later that year, Army Staff Sergeant Daniel Horner used the round to win his fourth USPSA Multi-Gun National Championship. The round was approved by SAAMI on January 17, 2011. We did that, and called it the 300 AAC Blackout (300 BLK)." 300-221 wildcat concept, determine the final specs for it, and submit it to SAAMI. 300 Whisper because Remington is a SAAMI company, and will only load ammunition that is a SAAMI-standard cartridge.
They also wanted a source for ammunition made to their specs.
#Subsonic 300 blackout ballistics full#
bullets from an M4 platform while using normal bolts and magazines, and without losing the full 30-round capacity of standard magazines. A military customer wanted a way to be able to shoot. "We started development in 2009, but most of the work was done in 2010. Director of Research at AAC, Robert Silvers summarized its development: BLK with ease, owing to the round's compatibility with the existing rifle platform. Today, many shooters and gun owners build AR-15s chambered in 300. It was developed by Advanced Armament Corp (AAC) in 2009 to 2010 for the military's M4 rifle. Officially called 300 AAC Blackout ( designated 300 BLK by SAAMI standards), this round is a 7.62x35mm intermediate rifle cartridge. We review ballistics and compare it to 5.56 NATO, we cover which parts are compatible with the AR-15's traditional 5.56/.223 parts, and what configuration - barrel, gas, twist rate, and buffer - is best for building a well-rounded, accurate, reliable gun. This guide breaks down 300 BLK in its entirety.
This dual-purpose round can be fired as a subsonic or supersonic cartridge, suppressed or un-suppressed, without having to modify your weapon (if you build it right). The military's 300 Blackout round became one of the most popular in recent years, and you can easily build or modify your AR-15 with a 300 Blackout kit. The AR-15 plays host to a few different calibers and cartridges.
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