 He designed this cartridge ex novo (the 9.3×64mm Brenneke has no other cartridge as parent case) and introduced it commercially in 1927.This big-game cartridge is the most powerful cartridge he designed.The 9.3×64mm Brenneke was designed to have the largest possible case capacity without any shape or dimensional drawbacks that would hamper its chambering and perfect functioning in Mauser Gewehr 98 rifles that were then standard issue in the German military.