| 词条 | 7×20mm Nambu |
| 释义 |
|name= 7×20mm Nambu |image= |caption= |origin=Japan |type= Pistol |service= 1903-1945 |used_by= Japan |wars= World War II |designer= Kijiro Nambu |design_date= 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? |number= Pistols - Possibly less than 6,500. 1. Tokyo c. 5,900 and 2. TGE c. 550. Number of 7x20mm 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. |is_SI_specs=yes |parent= |case_type=Bottleneck rimless |bullet=7.08 |neck=7.64 |shoulder=8.62 |base=8.91 |rim_dia=9.11 |rim_thick=0.98 |case_length=19.80 |length=26.80 |case_capacity= |rifling= |primer=Small pistol |max_pressure= |max_cup= |filling= |filling_weight= |detonation= |yield= |is_SI_ballistics=yes |bwunit= |bw1=56 |btype1=FMJ |vel1=240 |en1=108 |bw2= |btype2= |vel2= |en2= |bw3= |btype3= |vel3= |en3= |bw4= |btype4= |vel4= |en4= |bw5= |btype5= |vel5= |en5= |test_barrel_length=83 mm (3.25 in) |balsrc= }} 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 more than a .25 ACP and close to the .32 ACP.[2][3][4] References 3 : Pistol and rifle cartridges|Military cartridges|World War II infantry weapons of Japan |
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