8x22mm Nambu
From Wikipedia, the free encyclopedia
| 8x22mm Nambu | ||
|---|---|---|
| Type | ||
| Place of origin |  Japan |
|
| Service history | ||
| In service | 1904-1945 | |
| Used by | Japan | |
| Wars | Second Sino-Japanese War, World War II | |
| Production history | ||
| Designer | Kijiro Nambu | |
| Designed | 1904 | |
| Specifications | ||
| Case type | bottleneck rimmed | |
| Bullet diameter | 8.18 mm (0.322 in) | |
| Neck diameter | 8.73 mm (0.344 in) | |
| Shoulder diameter | 9.86 mm (0.388 in) | |
| Base diameter | 10.32 mm (0.406 in) | |
| Rim diameter | 10.50 mm (0.413 in) | |
| Case length | 21.25 mm (0.837 in) | |
| Overall length | 31.75 mm (1.250 in) | |
| Primer type | small pistol | |
| Ballistic performance | ||
| Bullet weight/type | Velocity | Energy |
| 102 gr (6.6 g) FMJ | 290 m/s (950 ft/s) | 274 J (202 ft·lbf) |
| Test barrel length: 117 mm (4.61 inches) |
||
The 8 mm Nambu is a rimless, bottleneck handgun cartridge introduced in Japan in 1904 for the Type A Nambu pistol. It was also used in the Type 14 Nambu and Type 94 pistols, and the Type 100 submachine gun. It uses .320" bullets. Power is relatively low, with military loads developing about 200 foot pounds, comparable to the American .380 ACP and substantially weaker than contemporary military cartridges such as 9x19mm Parabellum and 7.62x25mm Tokarev. 8 mm Nambu production ceased after the end of World War II, as the weapons that fired it were removed from service. Some small-scale production has occurred at various times in the United States for use in captured Japanese pistols, but the expense of these rare cartridges makes handloading common among owners of 8 mm Nambu pistols.
