HSM Match .300 AAC Blackout 220gr Sierra MatchKing Ammo, 20-Round Box

HSM Match .300 AAC Blackout ammunition (part no. 300BLK4N) loads a 220-grain Sierra MatchKing Boat Tail Hollow Point bullet, a heavy-for-caliber weight favored by shooters running suppressed .300 Blackout rifles. HSM builds its Match line to hold its own against far larger competitors, relying on premium Sierra components and careful assembly rather than shortcuts. The Sierra MatchKing is a purpose-built match bullet, prized for extremely consistent flight and tight groups rather than terminal expansion, which is exactly what precision and suppressed shooters want out of a heavy 300 Blackout load. Packed in brass cases 20 to the box, this is rifle ammunition built for consistency, not compromise.

Key Specifications

• The chambering is .300 AAC Blackout, the standard cartridge for suppressed AR-platform carbines.
• The bullet weighs 220 grains, a heavy-for-caliber weight favored for suppressed .300 Blackout shooting.
• The bullet is a Sierra MatchKing Boat Tail Hollow Point, a match-grade design built for consistency, not expansion.
• The boat-tail profile holds tight, repeatable groups shot after shot.
• HSM assembles this load with premium Sierra components, built to compete with far larger ammunition makers.
• Cases are brass, built for consistent ignition and reliable extraction.
• HSM packages this load 20 rounds per box, 10 boxes per case, for high-volume precision shooters.
• Each box holds 20 rounds, enough for a focused precision session.
• Cost runs about $1.70 a round, reasonable pricing for a match-grade .300 Blackout load.

Frequently Asked Questions

Is this bullet designed to expand like a hunting round? No, the Sierra MatchKing is a match bullet built for consistent, accurate flight rather than terminal expansion.

Why is 220 grains a common weight for .300 Blackout? Heavier bullets in this caliber are popular with shooters running suppressed rifles, where the heavier weight suits reduced-velocity, quiet shooting.

Is HSM Match a genuine precision option compared to major brands? Yes, HSM builds this load with premium Sierra components specifically to compete with larger, well-known match ammunition makers.

Buy HSM Match .300 Blackout 220gr Ammo

Suppressed .300 Blackout shooters know a heavy, consistent bullet is the whole game, and this Sierra MatchKing load delivers exactly that. Run it through your can and trust the groups to stay tight. Order from our Lubbock, Texas gun shop and it ships fast to your door.