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The 7.62×39mm (also called 7.62 Soviet, formerly .30 Russian Short) [5] round is a rimless bottlenecked intermediate cartridge of Soviet origin. The cartridge is widely used due to the global proliferation of the AK-47 rifle and related Kalashnikov-pattern rifles, the SKS semi-automatic rifle, and the RPD/RPK light machine guns.
The .308 Winchester is measured across the grooves and uses a .308-in diameter (7.82-mm) bullet; the military-specification version is known as 7.62 × 51 mm NATO, so called because the bore diameter measured between the lands is 7.62 mm, and the cartridge has a case 51 mm long.
The overall case length after the shortening and re-sizing is 1.565". The cartridge was designed to use .308" diameter bullets in weights of 110 to 150 grains, with a standard twist rate of 1-12". [1] Wilson Combat states that heavier bullets can be used in a barrel with a 1-8" twist rate for subsonic loads. [4]
= 308.057 599 609 375 ... The angle subtended at the center of a circle by an arc whose length is equal to the circle's radius. ... ≡ g⋅cm/s 2 = 10 −5 N ...
According to the book “Du und dein Heer"(1943) the regular s.S. projectile had the following penetration performance: 65 cm (26 in) of dry pine wood at 100 m (109 yd), 85 cm (33 in) at 400 m (437 yd), 45 cm (18 in) at 800 m (875 yd) and 20 cm (8 in) at 1,000 m (1,094 yd), 10 mm (0.39 in) of iron at 300 m (328 yd), 7 mm (0.28 in) at 550 m (601 ...
The rifle's overall length was not well suited for jungle warfare. Also, the weight of 7.62×51mm NATO cartridges limited the total amount of ammunition that could be carried in comparison with the 7.62×39mm cartridge of the Type 56 and AK-47 rifles, with which the Vietcong and North Vietnamese Army soldiers were equipped.
The .308×1.5" was one of the original short fat cartridge designs, having a length to width ratio of 3.17. The short fat cartridge design is considered to promote efficiency and shot to shot consistency. The .308×1.5" Barnes cartridge is comparable to cartridges such as the 7.62×39mm and the .30-30 Winchester. The .308×1.5" is capable of ...
The 7.62mm UKM [7.62×57mm] is a specialized rimless bottlenecked centerfire cartridge developed for long-range rifles.The commercially successful .338 Lapua Magnum cartridge has functioned as the parent case for the 7.62mm UKM, which is essentially a necked-down shortened version of the .338 Lapua Magnum.