7.62×54mmR

The 7.62×54mmR is a rimmed rifle cartridge developed by the Russian Empire and introduced as a service cartridge in 1891. Originally designed for the bolt-action Mosin–Nagant rifle, it was used during the late Tsarist era and throughout the Soviet period to the present day. Wikipedia
 
Rifling twist240 mm (1 in 9.45 in)
Bullet diameter7.92 mm (0.312 in)
Rim diameter14.40 mm (0.567 in)
Rim thickness1.6 mm (0.063 in)
Case length53.72 mm (2.115 in)
Case capacity4.16 cm3 (64.2 gr H2O)
Base diameter12.37 mm (0.487 in)