While narrow, the bullet itself measures almost one full inch in length, and features a sharp spitzer point and a boat-tail base. The original 5.45x39mm bullet weighed between 53 to 54 grain (gr), but modern variations are often seen in 60 gr. The rim is 1.5mm thick and houses the 5.60mm (.22 inch) diameter bullet in place. The case neck measures 6.29mm in diameter, while the shoulder diameter is 9.25mm and the base’s diameter measures 10mm. Considered an intermediate cartridge, the round features a rimless bottleneck steel case that measures 39.82mm in length. 5.45x39mm ammunition is a cartridge developed by the former Soviet Union and adopted by the country’s Armed Forces in 1974.
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