[2] The Borchardt C93 was manufactured and sold solely in its proprietary caliber, the 7.65×25mm Borchardt. Some test models were made in 7.65×21mm Parabellum and 9×18mm Borchardt, an experimental ...
That’s why the cartridge has the alternate name of “9mm Luger.” The German military wanted a handgun round with more juice, and Luger answered the call. The original Luger pistol, patented in 1908, ...