The Type 38 spitzer version of the 6.5×50mm cartridge remained unchanged until after the adoption of the Type 11 light machine gun in 1922. The Type 38 spitzer round fired a 139 gr bullet with a powder charge of 33 grains for a muzzle velocity of around 2,500 ft/s. This was later changed with the adoption of the Type 38 when Japan, in line with the other great powers around the same time, changed to the pointed, or spitzer, bullet in the first decade of the twentieth century. The Type 38 rifle, and Type 96 light machine gun used the 6.5 mm round, but were largely replaced by the 7.7×58mm Arisaka Type 99 rifle and Type 99 light machine gun, as the 6.5 mm was considered underpowered.Įarly 6.5×50mm cartridges had a cupronickel, round-nosed bullet weighing 160 gr fired with approximately 31 gr of smokeless powder. Type 44 cavalry carbines, first adopted in 1911, were also chambered in 6.5×50mm. In 1905, the round also came to be offered in the Type 38 Arisaka infantry rifle and carbine, both of which rendered the Type 30 obsolete in Imperial Army service. In 1902, the Imperial Japanese Navy chambered its Type 35 rifle for the cartridge as well. The new rifle and cartridge replaced the 8×52mm Murata round used in the Type 22 Murata rifle. It was adopted by the Imperial Japanese Army in 1897, along with the Type 30 Arisaka infantry rifle and carbine. 264 inches) followed by the case length in millimeters. The first part of the cartridge's name refers to the diameter of the bullet (6.5 mm or.
The 6.5x50 Japanese Arisaka naming convention follows common European naming conventions. Historically it has been referred to as the "6.5 Jap". The 6.5×50 Japanese Arisaka, 6.5mm Japanese Arisaka, 6.5 Jap, or 6.5x50mmSR Arisaka is a semi-rimmed rifle cartridge with a 6.5 mm (.264) diameter bullet.
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