Wilhelm Brenneke

The 7×64mm offered 10 to 12% extra muzzle velocity over the 7×57mm producing a flatter trajectory and greater long range performance.

The Wehrmacht decided - just like the German army in 1912 - to stick to the 8×57mm IS cartridge for their Mauser Karabiner 98k to keep things as simple as possible in their logistical chain.

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 M 98 bolt actions used in the Gewehr 98 rifles that were then standard issue in the German military.

In the 21st century the Russian military developed the semi-armour-piercing 9SN cartridge for the 9.3×64mm Brenneke SVDK variant of the Dragunov sniper rifle.

This cartridge has a 16.6 g (256 gr) pointed boat-tailed FMJ bullet with steel core and achieves a muzzle velocity of 770 m/s (2520 ft/s).

7×64mm rifle cartridge
9.3×64mm Brenneke rifle cartridge