The Info List - 6.5×50mmSR Arisaka

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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
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
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.


1 History 2 Chinese usage 3 Russian usage 4 British usage 5 Finnish usage 6 Today 7 Other 6.5 mm firearms 8 See also 9 References

History[edit] Early 6.5×50mm cartridges had a cupronickel, round-nosed bullet weighing 10.4 grams (160 gr) fired with approximately 2.0 grams (31 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 9.0-gram (139 gr) bullet with a powder charge of 33 grains (2.1 g) for a muzzle velocity of around 770 metres per second (2,500 ft/s).[1] The Type 38 spitzer version of the 6.5×50mm cartridge remained unchanged until after the adoption of the Type 11 light machine gun
Type 11 light machine gun
in 1922. The Type 11 was initially 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 the Type 11's 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".

Japanese military surplus 6.5x50mmSR Arisaka

This special ammunition was also issued to soldiers carrying the Type 96 light machine gun introduced in 1936, and to snipers issued the Type 97 sniper rifle, introduced in 1937. The advantage of the reduced charge ammunition to the sniper was that it 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. Also produced was 6.5mm gallery ammunition, incorporating a paper or wood bullet; and dummy rounds, which were issued to Japanese forces. These were either all brass rounds or, more commonly, red varnished wood with a metal base and rim. Ammunition used in the spigot-type Japanese grenade launchers often has paper bullets and can be identified by the staked primers. The round was criticized for being underpowered compared to other, more powerful, American and European cartridges such as the .30-06, .303 British, 7.92×57mm Mauser, and 7.62×54mmR. For this reason it was later replaced by the more powerful 7.7×58mm cartridge. Despite being smaller and less powerful, the 6.5×50mm cartridge held some advantages, since the larger rounds were significantly overpowered in engagements during the First and Second World Wars, which were mostly short-ranged taking place at less than 300 meters, and also generated more recoil in automatic weapons. A 6.5 mm round with the Type 38 pointed bullet loading still had good ballistics and terminal effectiveness with rapid yaw on impact causing severe wounds. Larger calibers were optimized for machine guns to use for long-range firing, and rifles were often made to chamber them in the interest of logistics, however Japan
had the 7.7 mm cartridge in use only by machine guns for years before developing a rifle for the round.[2] Chinese usage[edit] During the Second Sino-Japanese War, Chinese forces managed to capture large quantities of Type 38 rifles and Type 11 light machine guns. China's chronic lack of weaponry forced them to use these captured weapons en masse during the war. After the war, both nationalist and communist forces continued to use them in the civil war that followed. Some Chinese units were still using these weapons during the Korean War. Russian usage[edit] After observing the effectiveness of the Type 30 6.5×50mm round used against them during the Russo-Japanese War
Russo-Japanese War
of 1904–1905, leading Russian arms designers chambered early Russian semi-automatic rifle designs for the Japanese round. Since the standard Russian military rifle cartridge of the time, the 7.62×54mmR
rimmed round, was too powerful and generated excessive recoil in an automatic weapon a 6.5 mm round was seen as more appropriate. Early designs by Vladimir Fedorov utilized 6.5×50 mm, including the Fedorov Avtomat rifle which was issued to troops, though in small numbers. Later, Russian troops on the Armenian front were issued with Type 38 carbines by the Tsar's government. Russians also tended to modify the Type 38's magazine latch, as it was found that gloved hands would sometimes inadvertently nudge the magazine release and dump the ammunition. British usage[edit] In 1914, approximately 150,000 Arisaka
Type 30 and Type 38 rifles and carbines were sold to British forces (mainly to the Royal Navy), where they were used for training. The 6.5×50mm round was subsequently produced in Britain by the Kynoch
company and was officially adopted for British service as the .256-inch (6.5 mm) caliber Mk II in 1917. The Arab armies, organized by British captain T. E. Lawrence, to fight against the Ottoman Empire
Ottoman Empire
during World War I, were armed with a portion of the 500,000 rifles purchased from Japan
from 1914 to 1916, and many were the obsolete Type 30 rifles which had seen heavy service during the Russo-Japanese War
Russo-Japanese War
in 1904-1905.[3][4] In all, the 6.5×50 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, Finland
and Indonesia. Many of the British naval Arisakas were given to the White Russians. The 6.5 mm Arisaka
rifles were used mainly by the British for training, homeland defense, and by naval units. In 1916, the rifles were shipped to Russia
and none were left by the end of World War I.[2] Finnish usage[edit] The Russians, having purchased 600,000 Type 30 and Type 38 rifles from both direct purchase from Japan
during World War I
World War I
and also having captured examples during the Russo-Japanese War,[5] warehoused some of these rifles in Finland. During the Russian Revolution, many Finns seized the chance for independence and took Arisakas from Russian arsenals. They were used mainly by Finnish cavalry and after Finland's independence, experiments were taken to upgrade the Type 38s to 7.92×57mm Mauser. 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. Finnish-issued Arisakas have district numbers and an S branded on the stock. Today[edit] As Arisaka
rifles have increased in popularity with collectors, modern manufacture has resumed. The cartridge is available for retail in Europe
and North America, and is manufactured by Norma of Sweden, and Precision Cartridge Inc.. Brass cases are also manufactured and sold by Prvi Partizan
Prvi Partizan
for purposes of hand loading. Reloadable Boxer-primed cases are sometimes produced by reforming .220 Swift
.220 Swift
brass. Bullets are .264 caliber. Other 6.5 mm firearms[edit] Other 6.5×50mm long-arms used by Japan
included a few Type 13 Mauser rifles produced at Hoten (Mukden) Arsenal in Manchuria, China. These rifles were built on Danish Nielsen & Winther machinery originally for the Manchurian warlord Chang Tso Lin
Chang Tso Lin
beginning in 1924. When Japan took over the arsenal after the Manchurian Incident
Manchurian Incident
of 1931, the Type 13 rifle continued to be produced in 7.92×57mm Mauser
7.92×57mm Mauser
caliber, however an unknown number were also produced in 6.5×50mm. The Type I rifles built by Italy for Japan
under the terms of the Anti-Comintern pact from 1939 to 1943 are in standard 6.5×50mm Jap. Though Italian in origin, they do not safely fire the longer, but outwardly similar, 6.5×52mm Carcano
6.5×52mm Carcano
round. An unknown number of Dutch M1895 Mannlicher rifles and carbines captured by Japanese forces during the seizure of the Dutch East Indies
Dutch East Indies
in 1942 were converted to 6.5×50mm from the 6.5×53mm Dutch
6.5×53mm Dutch
rimmed chambering.[citation needed] See also[edit]

List of rifle cartridges 6 mm caliber Table of handgun and rifle cartridges


^ Johnson, Melvin M., Jr. (1944). Rifles and Machine Guns. New York: William Morrow & Company. p. 384.  ^ a b THE .256 INCH BRITISH: A LOST OPPORTUNITY ^ Honeycutt and Anthony p. 177 ^ Lawrence, T. E. (1922). "Chapter 13". Seven Pillars of Wisdom. ISBN 0-9546418-0-9. 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.  ^ Honeycutt & Anthony p. 177

The 6.5×50 Arisaka
(6.5 mm Japanese) - by Chuck Hawks The 6,5×50 Arisaka
By Giovanni Defrancisci Honeycutt Jr., Fred L. and Anthony, F. Patt. Military Rifles of Japan. Fifth edition, 2006. Julin Books, U.S.A. ISBN 0-9623208-7-0.

v t e

Japanese Infantry Weapons of World War II




Type 30 Type 2


Type 26 Type 14 North China
Type 19 Sugiura Type Type 94 Type 1 Type 2



Type 30 Type 30 Carbine Type 35 Type 38 Type 38 Carbine Type 44 Carbine Type 97 Sniper Rifle Type 99 Type 99 Sniper Rifle TERA


Type 4 Automatic Rifle Type 97 Automatic Cannon Type I Type Mo

Submachine guns

Experimental Model 1 Experimental Model 2 Type 100 MP 34 Beretta Model 38

Light machine guns

Type 11 Type 92 Type 96 Type 99

Heavy machine guns

Type 3 Type 92 Type 97 Type 1

Hand grenades

Type 10 Type 91 Type 97 Type 98 Type 99 Type 3 Type 4

Grenade launchers

Grenade Launcher

Type 10 Type 89


Type 100 Type 2

Rocket launchers

Experimental Type 4 Experimental Type 5


Number 1 Number 2 Type 93 Type 95 Type 100



6.5×50mmSR Type 30 6.5×50mmSR Type 38 7.7×58mmSR Type 89 7.7×58mmSR Type 92 7.7×58mm Type 97 7.7×58mm Type 99 .303 British


9×22mmR Type 26 8×22mm Type 14 7