7x64 Brenneke

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The 7×64mm, also known (unofficially) as the 7×64mm Brenneke, is a rimless bottlenecked centerfire cartridge developed by Wilhelm Brenneke for hunting medium to large game in 1917. Typical of European cartridges, the 7 denotes the 7 mm (.284 caliber) bullet, and the 64 denotes the 64 mm (2.5 in) case length. The 7×64 Brenneke is a popular hunting cartridge, especially in Central Europe due to its 11.95 mm (0.470 in) case head diameter and 84 mm (3.3 in) overall length. This allows the cartridge to easily be chambered in the Mauser 98 bolt-action rifle that was once the standard German infantry rifle.

The 7x64mm cartridge also has a rimmed counterpart, the 7x65R, which is nearly identical, but features a rim in order to be more easily utilized in single-shot and combination firearms. Both cartridges are still in commercial production today.