Barnes Precision Match 300 AAC Blackout Subsonic 220gr Sierra MatchKing OTM - 20 Rounds

Barnes Precision Match 300 AAC Blackout subsonic ammunition is built for shooters who demand consistency and accuracy in a specialized cartridge. This 20-round box pairs the proven Sierra MatchKing Open Tip Match (OTM) bullet with 220-grain subsonic loading—a setup designed for suppressed rifles, precision target work, and hunting applications where sound signature matters. Subsonic rounds stay below the sound barrier, making them ideal for bolt-action precision rifles and semi-auto platforms chambered in 300 Blackout.

The 220-grain MatchKing projectile is a purpose-built match bullet, known in competitive and precision circles for its aerodynamic design and jacket consistency. Paired with Barnes' quality control and load development, this round delivers the kind of shot-to-shot reliability that matters whether you're fine-tuning a new suppressed build, working up a load for a precision rifle, or running drills at an indoor range. The subsonic velocity keeps bullet integrity stable across various barrel lengths and suppressor combinations.

This is specialized ammunition—not a general-purpose hunting or plinking round. If you're running a 300 Blackout precision rifle, a short-barreled rifle with a can, or need consistent subsonic match-grade rounds, Barnes Precision Match delivers the consistency to back up your platform and your skill.

Key Features

• 300 AAC Blackout subsonic load optimized for suppressed rifle use
• 220-grain Sierra MatchKing Open Tip Match bullet design
• Engineered for accuracy and shot-to-shot consistency
• Loaded to subsonic velocity for sound-controlled shooting
• 20 rounds per box

Specifications

Frequently Asked Questions

What is subsonic ammunition and when do I use it?

Subsonic ammunition is loaded to travel below the speed of sound (around 1,125 fps), which eliminates the supersonic "crack" that would normally escape even a suppressed rifle. It's ideal for suppressed 300 Blackout rifles, indoor ranges, and situations where noise reduction is a priority. It also works well for precision target shooting and hunting in noise-sensitive environments.

Will subsonic 300 Blackout work in any 300 Blackout rifle?

Yes. Any 300 AAC Blackout rifle, bolt-action or semi-auto, will chamber and fire subsonic rounds safely. Subsonic loads perform best in longer barrels (8 inches or more) and are particularly well-suited to suppressed platforms where you want the full benefit of sound reduction.

What makes the Sierra MatchKing bullet different?

The MatchKing is a match-grade bullet with carefully controlled jacket concentricity and aerodynamic design, making it a precision choice rather than a general hunting or plinking round. It's favored in competitive shooting and precision rifle work for its consistency and accuracy potential.

What's included in this box?

You receive 20 loaded rounds of 300 AAC Blackout subsonic ammunition with 220-grain Sierra MatchKing OTM bullets. These are finished, ready-to-shoot rounds—no reloading components included.