HSM Subsonic 8.6 Blackout 300gr BTHP, 20-Round Box

HSM (part no. 86BLK1N) loads this 8.6 Blackout round with a heavy 300-grain boat-tail jacketed hollow point tuned specifically to subsonic velocity for suppressed rifles. HSM builds this load around the same principle that makes subsonic .300 Blackout work: a heavy-for-caliber bullet carries meaningful downrange energy even at velocities below the speed of sound, where a lighter bullet would fall flat. The case is reloadable for high-volume suppressed shooters. In rifle ammunition built for suppressed shooting, this is a purpose-engineered subsonic load.

Key Specifications

• The chambering is 8.6 Blackout.
• The bullet weighs 300 grains, a heavy weight built specifically for subsonic loading.
• The bullet is a boat-tail jacketed hollow point (BTHP).
• This is a subsonic load, staying below the speed of sound for suppressed shooting.
• The case is reloadable.
• The cost works out to about $3.04 per round at the listed box price.
• Each box holds 20 rounds.
• Boxes are packaged 25 to a case.
• The full case totals 500 rounds.

Frequently Asked Questions

Why does subsonic 8.6 Blackout use such a heavy bullet? A heavier bullet is needed to carry meaningful downrange energy at subsonic velocity, the same principle behind heavy-bullet subsonic .300 Blackout loads.

Do I need a suppressor to shoot this ammunition? No, it will fire in any 8.6 Blackout rifle, but its main advantage, eliminating the sonic crack, only applies when fired through a suppressor.

Buy HSM Subsonic 8.6 Blackout 300gr BTHP Ammo

A suppressed short-barrel build deserves a heavy subsonic bullet engineered for it, and HSM built this load around exactly that principle. Order from our Lubbock, Texas gun shop and it ships fast to your door.