Rifle cartridge reference
.300 Blackout Ammunition
Also known as .300 BLK, 7.62x35mm.
Designed to run in AR-15s from short barrels and suppress well with subsonic loads — a specialist round for compact, quiet setups.
At a glance
Common firearms in .300 Blackout
Frequently asked
How much does .300 Blackout cost per round?+
.300 Blackout typically runs about $0.70–$1.30 per round online, roughly $1,000 for a 1,000-round case at the middle of that range (as of 2026). Bulk cases lower the per-round cost, while premium defensive or match loads run higher. Prices move with supply, so track your own cost per round over time.
What is .300 Blackout used for?+
.300 Blackout is most commonly used for suppressed, short-barrel, hunting. Designed to run in AR-15s from short barrels and suppress well with subsonic loads — a specialist round for compact, quiet setups.
What firearms are chambered in .300 Blackout?+
Popular options include AR-15 (.300 BLK), SIG MCX, Ruger American Ranch. It falls in the rifle category.
How much does .300 Blackout recoil, and is it available?+
.300 Blackout has moderate recoil for its class, and availability is currently "common." You'll find it at most retailers and online.
Track your .300 Blackout the smart way
Rangium logs your .300 Blackout by the round: stock on hand, cost per round and spend over time, with low-stock warnings when you run short. Ask Vanta how much you have left, and list or find .300 Blackout firearms in the marketplace.