7×20mm Nambu

7×20mm Nambu
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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v t e Japanese infantry weapons of World War II
Bladed weapons	Swords: Guntō, Bayonets: Type 30, Type 2
Handguns	Type 26 revolver Type 14 (Nambu) North China Type 19 Sugiura Type Type 94 pistol Hamada Type 1, Type 2 pistols
Rifles (Arisaka)	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
Rifles (other)	Type 97 automatic cannon Type Hei rifle Type Kō rifle Type 4 automatic rifle Type I rifle Type Mo
Submachine guns	Experimental Model 1 Experimental Model 2 Type 100 Type Be Type Su Beretta Model 38
Light machine guns	Type 11 Type 89 Type 92 Type 96 Type 97 Type 98 Type 99 Type 1
Heavy machine guns	Type 3 Type 92 Type 93 Type 97 Type 1
Hand grenades	Type 10 Type 91 Type 97 Type 98 Type 99 Type 3 Type 4
Grenade launchers and attachments	Type 10 Type 89 Type 100 Type 2
Rocket launchers	Experimental Type 4 Experimental Type 5
Flamethrowers	Number 1 Number 2 Type 93 Type 95 Type 100
Rifle cartridges	6.5×50mmSR Type 30/Type 38 7.7×58mmSR Type 89 7.7×58mmSR Type 92 7.7×58mm Type 97/Type 99 7.7×56mmR British 7.92×57mm Mauser
Handgun cartridges	7×20mm Nambu 8×22mm Type 14 9×19mm Parabellum 9×22mmR Type 26