PMX produces copper alloys for small and large caliber commercial ammunition. The French introduced the first ammunition with metal cartridge casings in the 1840s. A copper alloy was chosen because it was easy to work with and corrosion-resistant. Ferrous metals tended to rust.

By the 1880s, the cases were made of harder brass alloys which is still used in bullets and shell casings today. As bullet velocities increased, it became necessary to coat the lead bullets with copper to protect the firearm and keep the lead from stripping the rifling.

Our owner, the Poongsan Corporation, has developed many technological advances in ballistics and ammunition during the past forty years. Poongsan produces military ammunition at its two defense plants in Korea.

These plants develop and supply a wide range of small to large caliber ammunition ranging from 5.56mm cartridges to eight inch projectiles. The company's ammunition is used in anti-aircraft guns, mortars, howitzers, and tank guns. Poongsan also develops and exports over forty different types of commercial ammunition.

The extensive ballistics expertise within Poongsan has enabled PMX to work with North American ammunition manufacturers to develop copper and brass ammunition alloys that improve performance, reliability, and resist corrosion.