7.7x58mm Arisaka
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| Type 99 7.7 mm rimless | ||
|---|---|---|
 7.7x58mm Arisaka |
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| Type | Rifle | |
| Place of origin |  Japan |
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| Production history | ||
| Produced | 1939–1945 | |
| Variants | Type 92 semi-rimmed 7.7 mm, Navy type 7.7 mm | |
| Specifications | ||
| Parent case | .303 British | |
| Bullet diameter | 8.0 mm (0.31 in) | |
| Neck diameter | 8.6 mm (0.34 in) | |
| Shoulder diameter | 10.9 mm (0.43 in) | |
| Base diameter | 11.9 mm (0.47 in) | |
| Rim diameter | 11.9 mm (0.47 in) | |
| Rim thickness | 1.0 mm (0.039 in) | |
| Case length | 57 mm (2.2 in) | |
| Overall length | 75 mm (3.0 in) | |
| Ballistic performance | ||
| Bullet weight/type | Velocity | Energy |
| 11.3 g (174 gr) (Ball) | 730 m/s (2,400 ft/s) | 3,007 J (2,218 ft·lbf) |
The 7.7x58mm Arisaka cartridge or Type 99 rimless 7.7 mm was chambered in the World War II Arisaka Type 99 Rifle. The cartridge was designed to replace the aging 6.5×50mm Arisaka cartridge after seeing the .303 British with Bren LMG, which was used by the former "Jin" ("晉") army (local troops of Shanxi province) in action, and the 7.92×57mm Mauser with the Gewehr 88, which was used by the National Revolutionary Army in action in China during 1937. Due to lack of materials the plan to phase out the 6.5 mm Arisaka cartridge by the end of the war was not completed.
While the round chambered by the Arisaka rifle used a rimless case, rimmed and semi-rimmed variants were produced for use in some Japanese machine guns. The 7.7 mm Arisaka uses the same .311–.312" bullets as the .303 British, and its cartridge case is similar in power to the .30-06 Springfield (7.62×63mm). Factory loaded ammunition and brass cases are available from Norma and Graf; Hornady, Sierra and Speer also produce usable bullets.
[edit] See also
- List of rifle cartridges
- 7 mm caliber—Other 7mm cartridges
[edit] References
- TM 9-1985-4, Japanese Explosive Ordnance
- "The 7.7x58 Japanese Arisaka (7.7 mm Jap)" by Chuck Hawks
- "7.7 mm Japanese or 7.7x58mm Japanese Arisaka"
- "The 7.7 Arisaka" by Bob Forker for Guns & Ammo
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