300 AAC BLACKOUT

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 Federal American Eagle 220gr. OTM Subsonic Ammo 500rds – 300 AAC Blackout Federal American Eagle 220gr. OTM Subsonic Ammo
    $549.95
    $1.1/ppr

    42 In Stock

  2. 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

    180 In Stock

  3. 20rds – 300 AAC Blackout Winchester Super Suppressed 200gr. Open Tip Ammo 20rds – 300 AAC Blackout Winchester Super Suppressed 200gr. Open Tip Ammo
    $23.95
    $1.2/ppr

    155 In Stock

  4. 20rds – 300 AAC Blackout Ammo Inc. stelTH 220gr. TMJ Ammo 20rds – 300 AAC Blackout Ammo Inc. stelTH 220gr. TMJ Ammo
    $23.95
    $1.20/ppr

    142 In Stock

  5. 20rds – 300 AAC Blackout Federal American Eagle Suppressor Subsonic 220gr. OTM Ammo 20rds – 300 AAC Blackout Federal American Eagle Suppressor Subsonic 220gr. OTM Ammo

    ☆☆☆☆☆ 1 Review(s)

    $24.45
    $1.22/ppr

    151 In Stock

  6. 200rds – 300 AAC Blackout Remington UMC 150gr. CTFB Ammo 200rds – 300 AAC Blackout Remington UMC 150gr. CTFB Ammo
    $244.95
    $1.22/ppr

    9 In Stock

  7. 20rds – 300 AAC Blackout Remington UMC 150gr. CTFB Ammo 20rds – 300 AAC Blackout Remington UMC 150gr. CTFB Ammo
    $24.95
    $1.25/ppr

    36 In Stock

  8. 20rds – 300 AAC Blackout Hornady Frontier 125gr. FMJ Ammo 20rds – 300 AAC Blackout Hornady Frontier 125gr. FMJ Ammo
    $24.95
    $1.25/ppr

    172 In Stock

  9. 20rds – 300 AAC Blackout Federal Power-Shok 150gr. JSP Ammo 20rds – 300 AAC Blackout Federal Power-Shok 150gr. JSP Ammo
    $25.95
    $1.30/ppr

    163 In Stock

  10. 200rds – 300 AAC Blackout Hornady BLACK 208gr. A-MAX Ammo 200rds – 300 AAC Blackout Hornady BLACK 208gr. A-MAX Ammo
    $269.95
    $1.35/ppr

    41 In Stock

  11. 20rds – 300 AAC Blackout Sierra 125gr. GameChanger Ammo 20rds – 300 AAC Blackout Sierra 125gr. GameChanger Ammo
    $28.45
    $1.42/ppr

    5 In Stock

  12. 200rds – 300 AAC Blackout Hornady BLACK 110gr. V-MAX Ammo 200rds – 300 AAC Blackout Hornady BLACK 110gr. V-MAX Ammo
    $284.95
    $1.42/ppr

    26 In Stock

  13. 20rds – 300 AAC Blackout Hornady BLACK 110gr. V-MAX Ammo 20rds – 300 AAC Blackout Hornady BLACK 110gr. V-MAX Ammo
    $28.95
    $1.45/ppr

    95 In Stock

  14. 20rds - 300 AAC BLACKOUT Hornady Black 208gr. A-Max Ammo 20rds - 300 AAC BLACKOUT Hornady Black 208gr. A-Max Ammo
    $29.95
    $1.50/ppr

    23 In Stock

  15. 200rds - 300 AAC Blackout Hornady Subsonic 190gr. Sub-X Ammo 200rds - 300 AAC Blackout Hornady Subsonic 190gr. Sub-X Ammo

    ☆☆☆☆☆ 1 Review(s)

    $299.95
    $1.5/ppr

    37 In Stock

  16. 20rds – 300 AAC BLACKOUT Hornady 135gr. FTX Ammo 20rds – 300 AAC BLACKOUT Hornady 135gr. FTX Ammo

    ☆☆☆☆☆ 1 Review(s)

    $31.95
    $1.60/ppr

    173 In Stock

  17. 20rds - 300 AAC Blackout Hornady Subsonic 190gr. Sub-X Polymer Tip Ammo 20rds - 300 AAC Blackout Hornady Subsonic 190gr. Sub-X Polymer Tip Ammo
    $31.95
    $1.60/ppr

    23 In Stock

  18. 20rds – 300 AAC Blackout Black Hills 125gr. OTM Ammo 20rds – 300 AAC Blackout Black Hills 125gr. OTM Ammo

    ☆☆☆☆☆ 2 Review(s)

    $31.95
    $1.60/ppr

    132 In Stock

  19. 20rds – 300 AAC Blackout Silver State Armory 220gr. Ballistic Tip Ammo 20rds – 300 AAC Blackout Silver State Armory 220gr. Ballistic Tip Ammo
    $36.95
    $1.85/ppr

    136 In Stock

  20. 20rds – 300 AAC Blackout Black Hills 110gr. TTSX Ammo 20rds – 300 AAC Blackout Black Hills 110gr. TTSX Ammo
    $41.95
    $2.10/ppr

    13 In Stock

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