Engineering:7×20mm Nambu
From HandWiki
Short description: Pistol cartridge
| 7×20mm Nambu | ||||||||
|---|---|---|---|---|---|---|---|---|
 7×20mm Baby Nambu | ||||||||
| Type | Pistol | |||||||
| Place of origin | Japan | |||||||
| Service history | ||||||||
| In service | 1903–1945 | |||||||
| Used by | Japan | |||||||
| Wars | World War II | |||||||
| Production history | ||||||||
| Designer | Kijiro Nambu | |||||||
| Designed | 1902 | |||||||
| Manufacturer | Type B Nambu Pistol 1. Tokyo Artillery Arsenal, Koishigawa, Tokyo 1903–1923 and 2. Tokyo Gas and Electric Co., Ltd., Tokyo 1923–1929. Was ammunition made in the same factories? | |||||||
| No. built | Pistols - Possibly less than 6,500. 1. Tokyo c. 5,900 and 2. TGE c. 550. Number of 7×20mm rounds made is unknown but today they are a quite rare collector's item occasionally found in WW2 boxes of 50 rounds. | |||||||
| Variants | At least 5, including a dummy. Variations mainly occur in type of bullet crimping, jacket type and rim thickness. | |||||||
| Specifications | ||||||||
| Case type | Bottleneck rimless | |||||||
| Bullet diameter | 7.08 mm (0.279 in) | |||||||
| Neck diameter | 7.64 mm (0.301 in) | |||||||
| Shoulder diameter | 8.62 mm (0.339 in) | |||||||
| Base diameter | 8.91 mm (0.351 in) | |||||||
| Rim diameter | 9.11 mm (0.359 in) | |||||||
| Rim thickness | 0.98 mm (0.039 in) | |||||||
| Case length | 19.80 mm (0.780 in) | |||||||
| Overall length | 26.80 mm (1.055 in) | |||||||
| Primer type | Small pistol | |||||||
| Ballistic performance | ||||||||
| ||||||||
| Test barrel length: 83 mm (3.25 in) | ||||||||
The 7×20mm Nambu is a rimless, bottleneck handgun cartridge designed in Japan for use in the Type B or "Baby" model Nambu pistol.[1] The cartridge is a scaled-down version of the 8×22mm Nambu used in all other Nambu pistol models. It has a muzzle energy greater than that of the .25 ACP and closer to the .32 ACP.[2][3][4]
References
- ↑ Miller, David (2007). Fighting Men of World War II, Volume I: Axis Forces—Uniforms, Equipment, and Weapons. Stackpole Books. p. 276. ISBN 978-0-8117-0277-5.
- ↑ "An Introduction to the Military Handguns of Imperial Japan". Gun Digest 2010. Krause Publications. 2009.
- ↑ Dave Maccar (2016). Handguns & Handgun Shooting. p. 88. ISBN 978-1440246104.
- ↑ T J Mullin (2015). 365 Guns You Must Shoot: The Most Sublime, Weird, and Outrageous Guns Ever. p. 167.
- The Hand Cannons of Imperial Japan, Derby, H., 1981, Taylor Publishing Company, ISBN 0-940424-00-2
- The Weapons Series no. 5 THE BABY NAMBU Japanese 7-mm. Pistol, Marsh, Roger, 1946, Pub. by the author.
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