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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 7.62 mm designation refers to the internal diameter of the barrel at the lands (the raised helical ridges in rifled gun barrels). The actual bullet caliber is often 7.82 mm (0.308 in), although Soviet weapons commonly use a 7.91 mm (0.311 in) bullet, as do older British (.303 British) and Japanese (7.7×58mm Arisaka) cartridges.
Folks, I think the fellow was simply pointing out that the 5.56 mm and the 7.62x39 mm were lower power assault class rounds vs. the 7.62x51 mm Nato round. In point of fact the 7.62x51 mm Nato, 30.06, 308, 7.56x54 mm, rounds all have very comparable performance despite having small packaging differences. Tirronan 18:59, 7 October 2006 (UTC)
The .308×1.5" is capable of launching a 150 gr (9.7 g) bullet at 2,500 ft/s (760 m/s). While the Barnes and 7.62×39 are similar length, the Barnes has a greater body girth, which provides a greater propellant capacity which in turn contributes to its performance advantage.
An intermediate cartridge is a rifle/carbine cartridge that has significantly greater power than a pistol cartridge but still has a reduced muzzle energy compared to fully powered cartridges (such as the .303 British, 7.62×54mmR, 7.65×53mm Mauser, 7.92×57mm Mauser, 7.7×58mm Arisaka, .30-06 Springfield, or 7.62×51mm NATO), and therefore is ...
The tinned case was adopted in 1943 to prevent its confusion with standard Ball ammunition. Cartridge, caliber .30, carbine, tracer, M27 [Red tipped bullet] - It came in cartons of 50 cartridges. 7,62mm Kurz [German > "Short"] - The NATO designation for .30 carbine ball M1
The .308 Winchester has a 3.64 mL (56 gr H 2 O) cartridge case capacity. [9] The exterior shape of the case was designed to promote reliable case feeding and extraction in bolt-action rifles and machine guns alike, under extreme conditions. .308 Winchester maximum C.I.P. cartridge dimensions. All dimensions in millimeters (mm) and inches.
The M240G has three gas settings, allowing the machine gun to have a fire rate between 650 and 750 rounds per minute when set to the first gas setting, 750–850 rounds per minute at the second gas setting, and 850–950 rounds per minute at the third gas setting, whereas the M240B only has one setting, restricting the fire rate to between 550 ...