Barnes Suppressor Series Subsonic .300 BLK 205gr Sierra GameKing JHP - Box of 20

Subsonic .300 BLK with expanding performance — purpose-built for the suppressed platform. Barnes Suppressor Series .300 BLK 205gr Sierra GameKing delivers subsonic velocities, clean-burning propellants, and the expanding terminal performance of the Sierra GameKing in a load engineered for reliable semi-auto cycling and maximum suppressor efficiency.

Barnes Suppressor Series .300 BLK 205gr is a subsonic rifle cartridge loaded with a Sierra GameKing expanding jacketed lead-core bullet, designed for suppressed .300 Blackout AR-15 platforms requiring reliable cycling, reduced fouling, and expanding terminal performance at subsonic velocities.

Four features define this load's suppressed platform advantage. Clean-burning propellants minimize gas blowback into the suppressor and action, keeping the baffle stack and bore cleaner over extended suppressed shooting sessions than standard powders that generate heavier residue under suppressor back-pressure. The subsonic velocity profile keeps the round below the speed-of-sound threshold, maximizing the suppressor's effectiveness and eliminating the supersonic crack that suppression cannot reduce. The Sierra GameKing expanding bullet provides terminal performance at subsonic impact velocities — a meaningful distinction over non-expanding subsonic loads where terminal effect depends on mass and momentum rather than hydraulic expansion. G1 BC of 0.480 and G7 BC of 0.245 provide consistent subsonic trajectory performance at the practical distances of suppressed .300 BLK use.

Loaded for .300 AAC Blackout-chambered AR-15 rifles. Subsonic. G1 BC: 0.480, G7 BC: 0.245. Boxer-primed, reloadable brass case.

205-grain Sierra GameKing expanding bullet. Jacketed lead-core. 20 rounds per box.

Built for suppressed .300 BLK AR-15 platforms where expanding subsonic performance and suppressor-friendly clean-burning propellants are the design requirements.

By Barnes Bullets. 20 rounds per box.