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HSM Ammunition's Subsonic 8.6 Blackout ammunition is purpose-built for shooters running suppressed 8.6 Blackout rifles who demand reliable, consistent performance below the sound barrier. The 300-grain hollow point boat tail MatchKing bullet is loaded to subsonic velocity, making it an excellent choice for suppressed hunting, tactical practice, and precision shooting where noise control matters. Whether you're running a short-barreled rifle or a precision 8.6 Blackout build, this ammunition pairs the ballistic efficiency of quality match-grade projectiles with the subsonic performance characteristics that keep your shots quiet downrange.
The 300-grain bullet weight is the sweet spot for 8.6 Blackout subsonic loads—heavy enough to maintain stable flight at subsonic speeds, yet designed with the boat tail and hollow point profile that serious shooters expect from MatchKing projectiles. HSM's consistent loading and quality control means round-to-round velocity variation is minimal, which translates to tight shot grouping and predictable point-of-impact shifts as you transition between distances. For suppressed rifle owners, subsonic ammunition eliminates the sonic crack that would otherwise occur at bullet exit, preserving the hearing-safe advantage of your suppressor setup.
Each box contains 20 rounds, making this a practical choice for range sessions, function testing, and hunting applications where you need reliable subsonic performance without the premium pricing of specialized match ammunition. HSM Ammunition has built a reputation for dependable loading, and this subsonic line is no exception—clean primers, consistent case prep, and matched components ensure you get what you paid for downrange.
Key Features
- 300-grain hollow point boat tail MatchKing bullet design
- Subsonic velocity optimized for suppressed 8.6 Blackout rifles
- Consistent loading for minimal velocity variation and tight grouping
- 20 rounds per box, ready for range or field use
- Quality HSM Ammunition components and assembly
Specifications
| Caliber | 8.6 Blackout |
| Bullet Weight | 300 grains |
| Bullet Type | Hollow Point Boat Tail (MatchKing) |
| Velocity | 960 fps |
| Energy | 614 ft-lbs |
| Rounds Per Box | 20 |
| Manufacturer | HSM Ammunition |
Frequently Asked Questions
Is this ammunition subsonic and suppressor-safe?
Yes. The 960 fps velocity is well below the sound barrier, making this load ideal for suppressed 8.6 Blackout rifles. You get hearing-safe operation without the sonic crack.
What is the MatchKing bullet profile, and why does it matter?
MatchKing refers to Sierra's match-grade bullet design featuring a hollow point and boat tail profile. This design minimizes velocity variation between rounds and provides consistent ballistic performance, which is why it's favored for both precision shooting and subsonic applications where stability matters.
Will this ammunition work in my 8.6 Blackout rifle?
Yes, this ammunition is loaded specifically for 8.6 Blackout chambers. Verify your rifle is chambered in 8.6 Blackout (not 6.5 Creedmoor or another cartridge) before loading.
How much ammunition is in each purchase?
Each box contains 20 rounds, which is standard for HSM Ammunition's subsonic offerings.
