7.62×39mm
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The 7.62×39mm round is a rimless bottlenecked intermediate cartridge of Soviet origin. The cartridge is widely used due to the worldwide proliferation of Russian SKS and AK-47 pattern rifles, as well as RPD and RPK light machine guns. Wikipedia
Bullet diameter: 7.85–7.9 mm (0.309–0.311") SAAMI 7.92 mm (0.312") CIP
Case capacity: 2.31 cm3 (35.6 gr H2O)
Case length: 38.70 mm (1.524 in)
Designed: 1943
Filling: SSNF 50 powder
In service: 1945–present
Maximum pressure (C.I.P.): 355.0 MPa (51,490 psi)
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