Barnes Suppressor Series .300 AAC Blackout — 205gr Subsonic

Barnes Subsonic .300 Blk 205gr Sierra Game King Ammunition - 20 Rounds

Get the quiet, reliable subsonic performance your suppressed .300 Blackout deserves with Barnes Suppressor Series ammunition — purpose-built for shooters running a can, not repurposed standard-pressure ammo that happens to be slow.

This load pairs Barnes' Suppressor Series with a 205-grain Sierra GameKing JHP bullet, delivering genuine subsonic velocity for a quieter shot when running suppressed. Clean-burning powder is specifically selected to minimize fouling in your suppressor and action, meaning less maintenance and more range time between cleanings. The heavier 205-grain bullet weight is exactly what subsonic .300 Blackout loads need to maintain reliable expansion and consistent performance at reduced velocities where lighter bullets often struggle.

Smooth, reliable cycling is a real focus of this load's design, since subsonic ammunition can be finicky in semi-auto platforms if the pressure curve isn't dialed in correctly. Barnes built this round specifically to feed and function reliably in suppressed .300 Blackout rifles and pistols, rather than treating subsonic performance as an afterthought. Each box contains 20 rounds.

Whether you're running a dedicated suppressed .300 Blackout build, want genuinely quiet performance without sacrificing reliable cycling, or need ammunition engineered specifically for subsonic use rather than just loaded slow, Barnes Suppressor Series gives you a purpose-built round designed around how you actually shoot.

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Frequently Asked Questions

Q: What caliber and bullet weight is this ammunition?
A: It's .300 AAC Blackout with a 205-grain Sierra GameKing JHP bullet.

Q: Is this ammunition subsonic?
A: Yes, this load is specifically designed for subsonic performance, ideal for suppressed shooting.

Q: How many rounds are in each box?
A: Each box contains 20 rounds.

Q: What makes this different from standard .300 Blackout ammunition?
A: Barnes Suppressor Series ammunition is purpose-built for suppressed shooting, using clean-burning powder to minimize fouling and a bullet weight and pressure curve specifically tuned for reliable subsonic performance and smooth cycling.

Q: Will this ammunition cycle reliably in a semi-auto rifle or pistol?
A: Yes, this load is engineered specifically for smooth, reliable cycling in suppressed .300 Blackout semi-auto platforms.

Q: What bullet design does this ammunition use?
A: It uses the Sierra GameKing JHP (jacketed hollow point) bullet.