300 AAC Blackout

| 15 April 2012 | 0 Comments

300 AAC BLACKOUT / 300BLK / 7.62X35

Advanced Armament Corporation decided to design a 30 cal round that will from the start be a commercial SAAMI spec round available for manufacture by Commercial ammunition manufacturers. This a philosophy in contrast to the similar 300 Whisper which has been a wild cat round from the start although I understand that may change in future.

The 300 AAC Blackout plastic tipped, left, compared to 300 AAC BLACKOUT 125 match, 300 AAC BLACKOUT 220 subsonic, 5.56mm, and 7.62×39mm.


The design objectives of AAC were:


  • Create a reliable compact 30-cal solution for the AR platform
  • Utilise existing inventory magazines unmodified while retaining their full capacity
  • Create optimal platform for sound and flash suppressed fire
  • Create compatible supersonic ammo that matches 7.62×39 ballistics
  • Provide the ability to penetrate barriers with high-mass projectiles
  • Provide all capabilities in a lightweight, durable, low recoiling package.


The 300BLK is a .30-caliber round with excellent application in the standard AR platform. The round is used in the standard AR 5.56 magazines (although care should be taken when reloading to observe OALs provided by AAC to enable the round to fit and function properly in the standard AR magazine – this is due to the rim inside the magazine which may influence alignment if the ogive of the bullet does not interface properly with the inside diameter of the magazine.)

The benefit of the 300BLK over the 7.62×39 is the fact that the round fits into the std AR mag due to it very low taper in comparison to the 7,62×39 as well as slightly improved ballistics over the 7,623×39 and a wider variety of bullets.

The benefit of the 300BLK over 7,62×51 is the much lighter platform rifle, lighter recoiling, more controllable and true sub-sonic application possibility.

The 300BLK offers excellent terminal ballistics at South African bush contact ranges of up to 300 meters and would be an excellent high capacity rifle and round combination for anti-poaching units.

Details of South African available powders and reloading data for reloading the 300BLK will be made available as soon as the first rifles and components arrive. It seems that in line with reloading of the 300BLK in supersonic with USA available powders the powder to use would be S221 and for sub-sonic it would be S265.

MUZZLE ENERGY COMPARISONS (courtesy of AAC at http://300aacblackout.com/)

9” BARREL @ Muzzle

5,56 /M855 2558 ft/s. 901 ft-lb

7.62×39 / 123gr 2022 ft/s. 1117 ft-lb

6.8 SPC / 110gr 2157 ft/s. 1136 ft-lb

300BLK /123gr 2130 ft/s. 1238 ft-lb (37% over 5.56, 9% over 6.8 SPC, 11% over 7.63×39)
16” BARREL @ Muzzle

5,56 /M855 2938 ft/s. 1188 ft-lb

7.62×39 / 123gr 2245 ft/s. 1377 ft-lb

300BLK /123gr 2315 ft/s. 1462 ft-lb (23 over 5.56, 6% over 7.63×39)

6.8 SPC / 115gr 2400 ft/s. 1471 ft-lb (1% over 300BLK)

6.8 SPC / 110gr 2540 ft/s. 1576 ft-lb (8% OVER 300BLK)


Resources and information:

AAC web site http://300aacblackout.com/

Interesting information and Forum discussion on the 300BLK http://www.silencertalk.com/forum/viewforum.php?f=128

NEA-15 Rifles will soon be available from Honey Badger Armaments in this fantastic new cartridge.



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