Barnes Suppressor Series ammunition (part no. 32519) loads the 205-grain Sierra GameKing hollow point in .300 AAC Blackout, a purpose-built subsonic line optimized specifically for suppressor use. Barnes loads premium Sierra projectiles to its exacting standards, using clean-burning propellants that reduce gas blowback, improve cycling in semi-auto platforms, and deliver noticeably quieter shots through suppressor-ready firearms. The 205-grain GameKing is designed to expand even at subsonic velocities, adding dependable terminal performance that many subsonic loads sacrifice for a quiet report. In rifle ammunition for suppressed .300 Blackout shooters, this is a purpose-built subsonic load.

Key Specifications

• The chambering is .300 AAC Blackout, a compact, versatile AR-platform cartridge.
• The bullet is a 205-grain Sierra GameKing hollow point, engineered to expand even at subsonic velocities.
• The load is held to subsonic velocity, producing a noticeably quieter report through a suppressor.
• A clean-burning propellant reduces gas blowback and improves cycling in semi-auto platforms.
• The cases are brass, standard for reloaders and dependable extraction.
• Each box holds 20 rounds, sized for a focused suppressed range session.
• The loaded box ships at approximately 0.95 lbs, typical shipping weight for a 20-round box of .300 AAC Blackout.

Frequently Asked Questions

Does this bullet expand at subsonic velocity? Yes, the Sierra GameKing is engineered to expand even at the lower velocities subsonic .300 Blackout loads produce.

Is this load built for semi-automatic rifles? Yes, the clean-burning propellant is formulated to reduce gas blowback and improve cycling reliability in semi-auto platforms.

Buy Barnes Suppressor Series .300 Blackout 205gr Ammunition

A suppressor only delivers its full quieting effect when the ammunition behind it is built for the role, and Suppressor Series pairs that quiet report with genuine bullet expansion. Pattern it through your can and trust the terminal performance. Order from our Lubbock, Texas gun shop and it ships fast to your door.