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300 AAC BLACKOUT

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300 Blackout ammo was developed by Advanced Armament Corporation and Remington Defense in 2010 and standardized by the Sporting Arms and Ammunition Manufacturers Institute (SAAMI) in 2011, the 300 AAC Blackout (also known as 300 BLK or 7.63x35mm) is a relatively young cartridge, but one that is rapidly gaining in popularity.

The 300 BLK was developed around a long list of design parameters intended to allow the use of .30 caliber projectiles in the AR/M4 platform. Chief among them, the cartridge had to feed reliably from standard 30 round magazines and utilize their full capacity, which previous attempts with the 7.62x39 cartridge (used in the AK-47) failed to do. Other requirements included the ability to operate suppressed or unsuppressed in a short, lightweight configuration.

The propellants used in 300 BLK cartridges tend to be much faster burning than typical rifle powders, meaning the 300 BLK is well suited to pistol-length gas systems and suffers relatively little in the way of velocity when fired from short barrels. This makes the 300 BLK an ideal choice for AR-style pistols or short-barreled rifles. Learn a lot more about what 300 BLK can do in our 300 Blackout Ballistics Guide.

The cartridge uses a shortened 221 Fireball or .223 Remington case, shortened to 35mm with the new case mouth necked down to .308 caliber. Bullet weights for the 300 BLK range from 110 grain to 250grain, with lighter projectiles suited to maximum velocity while the heavier bullets are used for subsonic work and maintain high energy despite limited velocity.

Ballistically, the 300 BLK performs much like the 7.62x39mm cartridge, with a shorter effective range than 5.56x45mm NATO, but with more kinetic energy than the latter. Because of these characteristics, the 300 BLK is well suited to close range combat and for hunters wishing to use the AR platform.

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  1. 500rds – 300 AAC Blackout Ammo Inc. 150gr. FMJ Ammo 500rds – 300 AAC Blackout Ammo Inc. 150gr. FMJ Ammo

    $424.95

    $364.95

    $0.73/ppr

    52 In Stock

  2. 200rds – 300 AAC Blackout Armscor 147gr. FMJ Ammo 200rds – 300 AAC Blackout Armscor 147gr. FMJ Ammo
    $147.95
    $0.74/ppr

    7 In Stock

  3. 20rds – 300 AAC Blackout Armscor 147gr. FMJ Ammo 20rds – 300 AAC Blackout Armscor 147gr. FMJ Ammo
    $16.95
    $0.85/ppr

    14 In Stock

  4. 200rds – 300 AAC Blackout Ammo Inc. 110gr. V-MAX Ammo 200rds – 300 AAC Blackout Ammo Inc. 110gr. V-MAX Ammo
    $174.95
    $0.87/ppr

    24 In Stock

  5. 300 AAC Blackout - 124 Grain FMJ - Sellier & Bellot - 500 Rounds 300 AAC Blackout - 124 Grain FMJ - Sellier & Bellot - 500 Rounds
    $449.95
    $0.90/ppr

    19 In Stock

  6. 500rds - 300 AAC Blackout Federal American Eagle 150gr. FMJ Ammo 500rds - 300 AAC Blackout Federal American Eagle 150gr. FMJ Ammo
    $459.95
    $0.92/ppr

    43 In Stock

  7. 20rds – 300 AAC Blackout Ammo Inc. 150gr. FMJ Ammo 20rds – 300 AAC Blackout Ammo Inc. 150gr. FMJ Ammo
    $18.95
    $0.95/ppr

    113 In Stock

  8. 200rds – 300 AAC Blackout Ammo Inc. stelTH 220gr. TMJ Ammo 200rds – 300 AAC Blackout Ammo Inc. stelTH 220gr. TMJ Ammo
    $189.95
    $0.95/ppr

    33 In Stock

  9. 500rds – 300 AAC Blackout Sellier & Bellot Subsonic 200gr. FMJ Ammo 500rds – 300 AAC Blackout Sellier & Bellot Subsonic 200gr. FMJ Ammo
    $479.95
    $0.96/ppr

    29 In Stock

  10. 20rds – 300 AAC Blackout Sellier & Bellot 124gr. FMJ Ammo 20rds – 300 AAC Blackout Sellier & Bellot 124gr. FMJ Ammo
    $19.95
    $1.00/ppr

    178 In Stock

  11. 500rds – 300 AAC BLACKOUT Fiocchi Extrema 125gr. Hornady SST Ammo 500rds – 300 AAC BLACKOUT Fiocchi Extrema 125gr. Hornady SST Ammo
    $499.95
    $1.00/ppr

    3 In Stock

  12. 200rds – 300 AAC Blackout Winchester USA 125gr. Open Tip Ammo 200rds – 300 AAC Blackout Winchester USA 125gr. Open Tip Ammo
    $209.95
    $1.05/ppr

    41 In Stock

  13. 200rds – 300 AAC Blackout Winchester Super Suppressed 200gr. Open Tip Ammo 200rds – 300 AAC Blackout Winchester Super Suppressed 200gr. Open Tip Ammo

    $219.95

    $209.95

    $1.05/ppr

    43 In Stock

  14. 20rds – 300 AAC Blackout Sellier & Bellot Subsonic 200gr. FMJ Ammo 20rds – 300 AAC Blackout Sellier & Bellot Subsonic 200gr. FMJ Ammo
    $21.95
    $1.10/ppr

    147 In Stock

  15. 200rds – 300 AAC Blackout Winchester USA 147gr. FMJ Ammo 200rds – 300 AAC Blackout Winchester USA 147gr. FMJ Ammo
    $219.95
    $1.10/ppr

    4 In Stock

  16. 200rds – 300 AAC Blackout Winchester Subsonic 200gr. Open Tip Ammo 200rds – 300 AAC Blackout Winchester Subsonic 200gr. Open Tip Ammo
    $224.95
    $1.12/ppr

    47 In Stock

  17. 20rds – 300 AAC Blackout Ammo Inc. stelTH 220gr. TMJ Ammo 20rds – 300 AAC Blackout Ammo Inc. stelTH 220gr. TMJ Ammo
    $22.95
    $1.15/ppr

    124 In Stock

  18. 20rds – 300 AAC Blackout Winchester USA Ready 125gr. OT Ammo 20rds – 300 AAC Blackout Winchester USA Ready 125gr. OT Ammo
    $23.95
    $1.20/ppr

    183 In Stock

  19. 25rds – 300 AAC BLACKOUT Fiocchi Extrema 125gr. Hornady SST Ammo 25rds – 300 AAC BLACKOUT Fiocchi Extrema 125gr. Hornady SST Ammo
    $29.95
    $1.20/ppr

    153 In Stock

  20. 25rds – 300 AAC Blackout Fiocchi 220gr. HPBT MatchKing Ammo 25rds – 300 AAC Blackout Fiocchi 220gr. HPBT MatchKing Ammo
    $29.95
    $1.20/ppr

    129 In Stock

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