7.65×21mm Parabellum

The 7.65×21mm Parabellum (designated as the 7,65 Parabellum by the C.I.P. and also known as .30 Luger and 7.65mm Luger) is a pistol cartridge that was introduced in 1898 by German arms manufacturer Deutsche Waffen- und Munitionsfabriken (DWM) for their new Pistol Parabellum. The primary developers of the pistol cartridge were firearms designers Georg Luger and Hugo Borchardt, who developed the round from the earlier 7.65×25mm Borchardt while working at DWM.

7.65×21mm Parabellum
7.65mm Parabellum, Swiss manufacture (Thun, 1973)
TypePistol
Place of originGerman Empire
Service history
In service1898–1949
Used byGermany, Switzerland, Portugal, Brazil, United States, and Finland
WarsPhilippine-American War
World War I
World War II
Production history
DesignerGeorg Luger and Hugo Borchardt
Designed1898
ManufacturerDeutsche Waffen und Munitionsfabriken
Specifications
Parent case7.65×25mm Borchardt
Case typeRimless, bottleneck
Bullet diameter7.85 mm (0.309 in)
Land diameter7.62 mm (0.300 in)
Neck diameter8.43 mm (0.332 in)
Base diameter9.93 mm (0.391 in)
Rim diameter9.98 mm (0.393 in)
Rim thickness1.22 mm (0.048 in)
Case length21.59 mm (0.850 in)
Overall length29.85 mm (1.175 in)
Case capacity0.93 cm3 (14.4 gr H2O)
Rifling twist275 mm (1 in 10.83 in)
Primer typeBerdan or Boxer Small pistol
Maximum pressure235.00 MPa (34,084 psi)
Maximum CUP28,000 CUP
Ballistic performance
Bullet mass/type Velocity Energy
6.03 g (93 gr) FMJ 370 m/s (1,200 ft/s) 412 J (304 ft⋅lbf)
Source(s): Modern Firearms & Ammunition, Pistol Ammunition
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