AFTE Store - The Persistence of Chamber Marks from Two Semiautomatic Pistols on Over 1,440 Sequentially-Fired Cartridge Cases

A Browning Hi-Power semiautomatic pistol and a Hi-Point model C semiautomatic pistol were test fired a total of 1,440 times each, and their chamber marks were examined. Ammunition used included cartridges with cases made of aluminum, brass, and nickel-plated brass. Microscopic comparison of the chamber marks revealed that they were reproducible and identifiable up to 960 firings and that the metallic composition of the cartridge case does affect the reproducibility of the chamber marks.