8x22mm Nambu

8x22mm Nambu

Infobox Firearm Cartridge
name= 8x22mm Nambu


caption=
origin= flagcountry|Japan
type=
service= 1904-1945
used_by= Japan
wars= Second Sino-Japanese War, World War II
designer= Kijiro Nambu
design_date= 1904
manufacturer=
number=
variants=
is_SI_specs=yes
parent=
case_type=bottleneck rimmed
bullet=8.18
neck=8.73
shoulder=9.86
base=10.32
rim_dia=10.50
rim_thick=
case_length=21.25
length=31.75
case_capacity=
rifling=
primer=small pistol
max_pressure=
max_cup=
filling=
filling_weight=
detonation=
yield=
is_SI_ballistics=yes
bwunit=
bw1=102
btype1=FMJ
vel1=290
en1=274
bw2=
btype2=
vel2=
en2=
bw3=
btype3=
vel3=
en3=
bw4=
btype4=
vel4=
en4=
bw5=
btype5=
vel5=
en5=
test_barrel_length=117 mm (4.61 inches)
balsrc=

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 8.2 mm (.320") bullets. Power is relatively low, with military loads developing about 280 J (200 foot·pounds), comparable to the American .380 ACP and substantially weaker than contemporary military cartridges such as 9x19mm Parabellum and 7.62x25mm Tokarev. As per the fate of most all contemporary Imperial Japanese weapon designs, the 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.The Japanese Army cartidges in 8 mm Nambu have no markings on the headstamp unlike the Japanese Navy cartridges.


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