Winchester Super Suppressed .300 AAC Blackout ammunition (brand part no. SUP300BLK2) is loaded specifically to pair with a suppressor, using a heavy 200 grain bullet in the weight class most shooters run subsonic through a can. Winchester‘s Super Suppressed line loads an open-tip full metal jacket bullet built for consistent flight rather than expansion, keeping the round quiet and stable through a suppressed barrel. This heavier-for-caliber weight is the standard choice among .300 Blackout shooters who want reliable subsonic-class performance without hand-loading their own ammunition. Packaged 125 rounds to a box with 6 boxes to a case, it is well suited to shooters who run a suppressed AR pistol or rifle regularly.

Key Specifications

• The chambering is .300 AAC Blackout, a cartridge purpose-built for suppressed and subsonic use in an AR-platform rifle.
• The bullet weighs 200 grains, a heavy-for-caliber weight in the class most shooters run subsonic through a suppressor.
• The bullet is an open-tip full metal jacket, built for consistent flight rather than terminal expansion.
• The open-tip design keeps the bullet stable and quiet through a suppressed barrel rather than optimizing for expansion.
• Each box holds 125 rounds, a bulk-friendly quantity for suppressor-equipped shooters.
• A full case packs 6 boxes, totaling 750 rounds for shooters who run a suppressed .300 Blackout often.
• Cost works out to about $0.90 per round, in line with pricing for factory-loaded suppressor ammunition.
• It is loaded under Winchester’s Super Suppressed line, built specifically to pair with a suppressor.
• The heavier bullet weight is chosen specifically for subsonic-class performance rather than supersonic speed.

Frequently Asked Questions

Is this ammunition subsonic? Winchester loads this round in the 200 grain weight class most .300 Blackout shooters run subsonic through a suppressor, though exact velocity can vary by barrel length.

Is this bullet designed to expand? No, the open-tip full metal jacket is built for consistent flight through a suppressor rather than terminal expansion.

Buy Winchester Super Suppressed .300 AAC Blackout Ammunition

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