The 6.5×50mm semi-rimmed (6.5×50mmSR) Japanese cartridge, currently manufactured under the designation 6.5mm Jap, was adopted by the Imperial Japanese Army in 1897, along with the Type 30 Arisaka infantry rifle and carbine. The new rifle and cartridge replaced the 8×52mm Murata round used in the Type 22 Murata Rifle. In 1902, the Imperial Japanese Navy chambered its Type 35 rifle for the cartridge as well. 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. Type 44 cavalry carbines, first adopted in 1911, were also chambered in 6.5×50mm.

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