300 AAC Blackout – 220 gr OTM – Black Hills (D300WHISPERN2) – 500 Rounds

Suppressed shooters looking for subsonic 300 Blackout with match-grade accuracy often land on Black Hills. This listing is Black Hills 300 AAC Blackout 220 grain open tip match subsonic ammo, MPN D300WHISPERN2, sold as a 500 round case. It is built for precise, quiet shooting from suppressed AR-15s and bolt guns.

Black Hills rates this load at 1,050 fps with 539 ft-lbs of muzzle energy from a 16 inch barrel, staying below the speed of sound for suppressed use. The 220 grain bullet is a Sierra open tip match design built for accuracy and consistent flight. Black Hills is known for tight quality control, which helps subsonic loads hold groups even with their curved trajectory. Match bullets are designed for accuracy, not controlled expansion, so this is a target and suppressed practice load rather than a hunting round.

It fits firearms chambered in 300 AAC Blackout or 300 Whisper, including AR-15 uppers in 300 BLK, the SIG MCX, Q Honey Badger, Daniel Defense DDM4 300S, Ruger American Ranch, and Savage 110 in 300 BLK. A common question is whether 300 Whisper and 300 Blackout are the same. They are nearly identical, and standard factory 300 Blackout ammunition is commonly labeled for both, but follow your rifle manufacturer’s guidance. Another common question is whether subsonic ammo can be zeroed the same as supersonic. No. Expect a different point of impact, so zero for the load you shoot most.

Black Hills D300WHISPERN2 is new production ammunition, not reloads, made in the USA by Black Hills in Rapid City, South Dakota. Cases are reloadable brass with boxer primers, and the load is non-corrosive. This listing ships as 25 boxes of 20 rounds for 500 total, all from one lot, which keeps a suppressed rifle’s subsonic zero and cycling predictable for many range trips.