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Now USPSA Certified!! 115gr, 124gr, and 147gr 9mm!!

Subsonic 300blk TMJ 220gr-Reman-30rds

(4 customer reviews)


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30rd Pack

The newest addition to Callaway Ballistics’ Shhh… line of subsonic ammunition for suppressed applications, the 300blk offering features Berry’s copperplated, 220-grain Spire Point projectile. With testing done on a 12″ sans-suppressor barrel, this loading averages out at 960fps. Our brass treatment process ensures that our remanufactured ammunition looks as close to new as possible while maintaining safe case thickness, as well as preventing all foreign material from being introduced into the manufacturing process. Our customers can be sure that every single round is manually inspected so that all characteristics conform to SAAMI standards and you can be confident with the Callaway Ballistics Shhh… line, you will get the most out of your suppressed shooting. Each box contains 30rds.

Additional velocity tests done with an attached suppressor to ensure proper performance on gas-operated firearms:



Max order limit: 8

Weight 1.5 lbs
Dimensions 2.5 × 2.5 × 2.5 in





.300 AAC Blackout (7.62x35mm)





4 reviews for Subsonic 300blk TMJ 220gr-Reman-30rds

  1. Andrew Jones (verified owner)

    Great product. Packaging is amazing. Shipping is lightening fast. Literally got my order the next day. Shoots amazing too. Just like I remembered what shooting was like before the “shortage”

  2. Michael McCafferty (verified owner)

    Great guys to work with. Very professional and outstanding customer service. Thank you

  3. Greg Ganter (verified owner)

    Good ammunition at an affordable price. Ships quickly. Thank you Callaway Ballistics!

  4. Gary Bucklew (verified owner)

    Good as it gets. Fast ship, not one single failure of any type , loading, firing, ejecting, fitment in magazine. Perfect at a reasonable price. I can afford he range again!

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