Premium Once-Fired .223 / 5.56 Brass for Reloading

Diamond K Brass carries premium once-fired .223 / 5.56 brass sourced and inspected to give reloaders clean, consistent cases you can trust. Unlike low-quality lots that can include warped or asymmetric casings (which increase the risk of malfunctions and feed issues), our brass is hand-checked and sorted so you get dependable performance on every load.

Buying once-fired .223 / 5.56 brass is one of the smartest ways to cut ammo costs—especially with current market prices for factory-loaded rounds. We stock bulk quantities in 500, 1,000, and 2,500 counts, giving commercial reloaders and hobbyists flexible options to scale their supply while saving substantially over buying loaded ammo.

Browse our surplus brass selection to find mixed headstamps, carefully cleaned cases, and other reloading essentials. While you’re here, explore our full inventory of calibers, components, and reloading guides to help you reload smarter and cheaper with confidence.