This review tests Black Hills 300 Blackout 110gr TTSX ammunition, noting its compatibility with STANAG magazines due to its ogive design. Testing across a 9-inch Sig Virtus and a 5.5-inch Sig Rattler showed impressive terminal ballistics, with velocities of 2209 FPS and 1933 FPS respectively. The round demonstrated significant expansion and penetration in gel, water, and through cinder blocks, proving effective at defensive ranges.
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