6.5×50mmSR Arisaka
…was the standard Japanese military cartridge from 1897 until the late 1930s for service rifles and machine guns when it was gradually replaced by the 7.7×58mm Arisaka. The 6.5×50mmSR was first introduced as the Type 30 cartridge with a round-nosed bullet, by the Imperial Japanese Army in 1897, for the newly adopted…