The 13.2 × 99 mm Hotchkiss Long, is a heavy machine gun cartridge developed by France during the interwar period for the Hotchkiss 13.2 mm machine gun. It saw major use as a heavy machine gun cartridg
From left: 13.2 × 99 mm Hotchkiss Long, 13.2 × 96 mm Hotchkiss Short, 13.2 × 92 mm SR Mauser