7×57mm Mauser

The 7×57mm cartridge, also known as the 7mm Mauser, 7×57mm Mauser, 7mm Spanish Mauser in the USA and .275 Rigby in the United Kingdom is a first-generation smokeless powder rimless bottlenecked rifle cartridge. Wikipedia
Rifling twist220 mm (1 in 8.66 in)
Bullet diameter7.24 mm (0.285 in)
Case length57.00 mm (2.244 in)
Rim diameter12.10 mm (0.476 in)
Case capacity3.90 cm3 (60.2 gr H2O)
Base diameter12.01 mm (0.473 in)
Shoulder diameter10.92 mm (0.430 in)