The 7.63×25mm Mauser (.30 Mauser Automatic) round was the original ammunition of the Mauser C96 service pistol. This cartridge headspaces on the shoulder of the case. The basis of this cartridge was the 7.65mm Borchardt of 1893, the only successful automatic pistol cartridge in production at the time. The 7.63mm Mauser is sometimes confused with the later 7.65mm Parabellum (.30 Parabellum), also a bottlenecked pistol cartridge.