- 6.5x50mm Arisaka
Infobox Firearm Cartridge
name=6.5x50mm SR Arisaka
Japan, Russia, United Kingdom, China, North Korea, South Korea, Thailand, Finland, Indonesia
World War I, Second Sino-Japanese War, World War II
primer= Large rifle
test_barrel_length= 800 mm
balsrc= The 6.5x50mm Semi-Rimmed
Japanese cartridge was adopted by the Imperial Japanese Armyin 1897 along with the Type 30 ArisakaInfantry Rifle and Carbine. The new rifleand cartridge replaced the 8x52mm Murataround used in the Type 22 Murata Rifle. In 1902 the Imperial Japanese Navychambered its Type 35 Riflefor 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 obsoleted the Type 30 in Imperial Army service. Type 44 Cavalry Carbines, first adopted in 1911, were also chambered in 6.5x50mm.
Early 6.5x50mm cartridges had a cupro-nickel round nosed bullet weighing convert|10.4|g|gr fired with approximately convert|2.0|g|gr of smokeless powder. 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 spitzer-bullet round fired a convert|9.0|g|gr|sing=on bullet with a powder charge of convert|2.5|g|gr for a muzzle velocity of around convert|770|m/s|ft/s.
The Type 38 spitzer version of the 6.5x50mm cartridge remained unchanged until after the adoption of the
Type 11 Light Machine Gunin 1922. The Type 11 was initial meant to fire standard Type 38 Rifle ball ammunition by means of ordinary five-shot Type 38 stripper clips. Subsequent use indicated that the higher pressures generated by the standard rifle ammunition caused parts wear and breakage in machine guns. It was thus decided to reduce the powder charge of Type 11 6.5 mm ammunition to overcome the problem. This reduced charge 6.5 mm ammunition can be identified by a letter "G" in a circle stamped on the outside of the ammunition packaging which stands for the first letter of "genso" - the Japanese word for "reduced." This special ammunition was also issued to soldiers carrying the Type 96 Light Machine Gunintroduced in 1936 and to snipers issued the Type 97 Sniper Rifle, introduced in 1937. The advantage of the reduced charge ammunition to the sniper aided in his concealment as the reduced charge rounds produced less muzzle flash than standard rounds and thus did not give away the sniper's position.
6.5 gallery ammunition incorporated a paper or wood bullet and dummy rounds as issued to Japanese forces were either all brass rounds or were more commonly red varnished wood with a metal base and rim. Ammunition used in the spigot-type Japanese grenade launchers often have paper bullets and can be identified by staked primers.
Other 6.5 mm firearms
Other 6.5x50mm long-arms used by Japan included a few Type 13
Mauserrifles produced at Hoten (Mukden) Arsenal in Manchuria, China. These rifles were built on Danish Nielsen-Winthermachinery originally for Manchurian warlord Chang Tso Linbeginning in 1924. After Japan took over the arsenal after the Manchurian Incidentof 1931 the Type 13 rifle continued to be produced in 7.92x57mm Mausercaliber, but an unknown number were also built in 6.5x50mm. The Type I rifles built by Italy for Japan under the terms of the Anti-Comintern pact from 1939-1943 are in standard 6.5x50 mm Japanese. Their Italian origin should not be taken to mean that these will safely fire the longer, but outwardly similar, 6.5x52mm Carcano round. An unknown number of Dutch M1895 Mannlicherrifles and carbines captured by Japanese forces during the seizure of the Dutch East Indiesin 1942 were converted to 6.5x50mm from 6.5x53mm Dutch rimmed caliber.
After observing the effectiveness of the Type 30 6.5x50mm round as used against them during the
Russo-Japanese Warof 1904-1905, leading Russian arms designers chambered early Russian semi-automatic rifledesigns for the Japanese round. Since the standard Russian militaryrifle cartridge of the time, the 7.62x54 mmRrimmed round, was too powerful and generated excessive recoil in an automatic arm - a 6.5 mm round was seen as more appropriate. Early semi-automatic designs by Vladimir Fedorovutilized 6.5x50 mm including the Fedorov Avtomatrifle which was actually issued to troops, though in small numbers. Later, Russian troops on the Armenian front were issued with Type 38 Carbines given by the Tsar's government. Russians also tended to modify the Type 38s magazine latch, as it was found that gloved hands would sometimes inadvertently nudge the magazine release and dump the ammunition.
In 1914 approximately 150,000 Arisaka Type 30 and Type 38 Rifles and Carbines were sold to British forces - mainly the
Royal Navywhere they were used for training. The 6.5x50mm round was subsequently produced in Britain by the Kynochcompany and was officially adopted for British service as the .256 inch caliber Mk II in 1917. The Arabarmies organized by British Captain T.E. Lawrence to fight against the Ottoman Empireduring World War Iare purported to have been issued with Type 30 Rifles by the British in 6.5 mm though some have opined that the Bedouinforces mainly used captured Turkish Mausers instead. In Seven Pillars of Wisdom, chapter 13, T. E. Lawrencewrites, "Later some Japanese rifles, most of them broken, were received. Such barrels as were still whole were so foul that the too-eager Arabs burst them on the first trial."In all, the 6.5x50 mm Japanese semi-rimmed round has been used in either Japanese or domestically designed weapons by Japan, Russia, the United Kingdom, China, North Korea, South Korea, Thailand, Finlandand Indonesia. Many of the British Naval Arisakas were handed over to the White Russians.
The Russians, having a surplus of Type 30 and Type 38 rifles from both direct purchase from Japan during WWI and also having captured examples during the Russo-Japanese War, had warehoused some of these rifles in Finland. During the Russian Revolution, many Finns seized the chance for independence and liberated many Arisakas from Russian arsenals. They were used mainly by Finn cavalry and after Finland's independence, experiments were taken to upgrade the Type 38s to 7.92. With parts and ammunition drying up, Finland relegated the Arisaka to the reserves and the merchant marines before trading a large number of them off to Estonia. Finn used Arisakas will have district numbers and an 'S' branded on the stock.
The cartridge was only available in loaded form to shooters in the United States by Norma of
Swedenfor many years but now brass cases can be had from Graf & Sons and quality hand-loads made up. Kinematics Research of Tennesseealso loads this cartridge, as does Hornady. Bullets are standard .264 caliber.
List of rifle cartridges
6 mm caliber
* [http://www.chuckhawks.com/6-5x50.htm The 6.5x50 Arisaka (6.5 mm Japanese)] - by Chuck Hawks
* [http://www.quarry.nildram.co.uk/256brit.htm THE .256" BRITISH: A LOST OPPORTUNITY] - British use of the 6.5x50mm
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