Hornady 300 Blackout Subsonic Ammunition

    “Shhh… tell everyone!”

    That’s how Hornady starts their marketing for their new 300 Blackout Subsonic Ammunition, and gives you a clue who might find an interest.

    The bullet weight is 190 grains and “Sub-X” stands for Subsonic eXpanding.


    Product Features – 300 Blackout Subsonic Ammunition

    “Sub-X™ Bullet Technology

    In addition to its patented Flex Tip, long grooves in the gilding metal jacket of the 190 gr Sub-X™ combine with the bullet’s flat profile to ensure expansion.

    Proven Performance

    Performance of 300 Blackout Subsonic meets or exceeds FBI Protocol terminal ballistic test requirements. Impact velocity of 1,020 fps into ballistic gelatin provides 16-18” penetration and 90%+ weight retention.

    Silent and Stealthy

    Hornady® Subsonic Ammunition doesn’t have the loud report of a supersonic round, and paired with a suppressor, it’s even quieter. Unique powders optimized for subsonic use result in a low flash signature, ideal for either suppressed or unsuppressed performance.”


    Below: A detailed picture of the bullet design and cartridge, with gun powder and primer. Polymer tip, boat tail design. The Sub-X bullet features a lead core and a cannelure for a positive case crimp, optimized for use in semi-automatic rifles.

    According to Hornady this cartridge will meet or exceed the FBI Protocol terminal ballistic test requirements.

    The BC is .437 (G1).

    Here’s a video with some more explaining, and shooting suppressed and into ballistic gel.

    You can find Hornady’s Product Page here: https://www.hornady.com/ammunition/subsonic#!/

    Hornady’s new 300 AAC Blackout (7.62x35mm)Subsonic comes in boxes of 20.

    You can pre-order them at Midway.

    Eric B

    Ex-Arctic Ranger. Competitive practical shooter and hunter with a European focus. Always ready to increase my collection of modern semi-automatics, optics and sound suppressors. TCCC Certified medic.