Fully Processed .300 AAC Blackout Brass

Our fully processed .300 AAC Blackout brass consists primarily of genuine once-fired brass with .300 AAC Blackout or .300 BLK headstamps. Some lots may include a small percentage of professionally converted .223/5.56 brass. Every case is processed to exact .300 AAC Blackout specifications and is thoroughly inspected to ensure it is clean, consistent, and ready to load.

Processing Includes:

Primarily factory .300 AAC Blackout headstamp brass
May include a small amount of converted .223/5.56 brass
Deprimed and full-length resized
Trimmed to proper SAAMI specifications
Primer pockets swaged when military crimps are present
Chamfered and deburred
Wet tumbled with stainless steel media for a like-new finish
Case gauged to verify proper chamber fit
Final visual and dimensional inspection

Why Choose Our .300 BLK Brass?

By using mostly factory headstamp .300 Blackout brass, you get greater consistency and uniformity while still benefiting from carefully processed, reload-ready cases. Whether you’re loading subsonic rounds for suppressed shooting or supersonic loads for hunting, our brass is prepared to perform.

Perfect For:

AR-15 rifles chambered in .300 AAC Blackout
Suppressed and subsonic ammunition
Hunting and defensive loads
Precision handloads
High-volume reloading

At Lake Effect Brass, we process every batch with the same care and attention to detail we would demand for our own reloads.

Mostly factory headstamp. Fully processed. Ready to load.

Shop

Fully Processed .300 Blackout

un-Processed .300 Blackout

Fully Processed 9MM

Unprocessed 9mm