The Barnes Suppressor Series Sierra GameKing load is a purpose-built, subsonic .300 AAC Blackout rifle cartridge loaded to perform through suppressor-equipped platforms. This load pairs a 205 grain Sierra GameKing projectile with Barnes’ subsonic charge to reduce gas blowback and improve cycling in semi-automatic rifles while maintaining consistent subsonic performance. Reported muzzle velocity for this loading is 1060 fps as provided in the product data.
Packaging: This product is sold per box containing 20 rounds. A case is comprised of 10 boxes; ordering the case quantity is achieved by ordering the required number of boxes to reach that total.
Key Specifications
- The manufacturer is Barnes.
- The caliber is .300 AAC Blackout.
- The bullet weight is 205 gr.
- The projectile is the Sierra GameKing.
- The load is described as suppressor-optimized, subsonic.
- The listed muzzle velocity is 1060 fps.
- There are 20 rounds per box.
- There are 10 boxes per case.
- The calculated rounds per case total 200 rounds based on provided box and case counts.
- The shipping weight is listed as 0.95 (value provided in the product data).
This Suppressor Series load is appropriate for shooters who require consistent subsonic performance from .300 AAC Blackout platforms equipped with suppressors. Its Sierra GameKing projectile is loaded to perform at reduced velocities while supporting reliable function in semi-automatic firearms and delivering controlled terminal performance at subsonic speeds.
Product information is supplied by the manufacturer and/or distributor and may be automatically formatted or enhanced using AI for clarity and consistency. While we strive for accuracy, specifications, features, and included items may change without notice. Always verify details using the manufacturer’s official documentation and the information shown on this product page before purchase or use.




