 6.5×50mmSR Arisaka

The 6.5×50 Japanese Arisaka, 6.5mm Japanese Arisaka, 6.5 Jap, or 6.5x50mmSR Arisaka is a semi-rimmed cartridge, with a 6.5 mm (.264) diameter bullet.Historically it has been referred to as the "6.5 Jap".