5.45×39mm

The 5.45×39mm cartridge is a rimless bottlenecked Intermediate cartridge. It was introduced into service in 1974 by the Soviet Union for use with the new AK-74. Wikipedia
 
Bullet diameter5.60 mm (0.220 in)
Rifling twist255 mm (1 in 10 inch) or; 200 mm (1 in 7.87 inch)
Case length39.82 mm (1.568 in)
Case capacity1.75 cm3 (27.0 gr H2O)
Base diameter10.00 mm (0.394 in)
Neck diameter6.29 mm (0.248 in)

Hornady 5.45x39 60 gr V-MAX® Hornady BLACK®

Hornady, BLACK, 5.45x39, 60 Grain, V-Max, Steel Case, 20 Round Box

$15.84 $11.41