9×18mm Makarov

The 9×18mm Makarov is a Russian pistol and submachine gun cartridge. During the latter half of the 20th century it was a standard military pistol cartridge of the Soviet Union and the Eastern Bloc, analogous to the 9×19mm Parabellum in NATO and Western military use. Wikipedia
Bullet diameter9.27 mm (0.365 in)
Base diameter9.95 mm (0.392 in)
Neck diameter9.91 mm (0.390 in)
Rim diameter9.95 mm (0.392 in)
Case length18.10 mm (0.713 in)
Case capacity0.83 cm3 (12.8 gr H2O)
Rifling twist240.00 (1 in 9.45 in)