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The below table gives a list of firearms that can fire the 7.62×39mm cartridge, first developed and used by the Soviet Union in the late 1940s. [1] 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.
The 7.62×39mm (aka 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 rifles , the SKS semi automatic rifle, as well as the RPD and 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.
7.62×54mmR lead core, bi-metal copper-steel full metal jacket bullet, polymer-coated steel case, non-corrosive, berdan primed. Note: Around summer 2013, some lots of this cartridge caliber from Romania contained corrosive components , thus the firearm needed to be thoroughly cleaned after each firing session.
The 6.5 Grendel bullets have a true diameter of 6.71mm / 0.264" and the 6.5 Grendel case can be formed from abundant 7.62x39 cases with a neck re-sizing die, and fire-forming a slight change to the shoulder, if the case is made from brass. Many of the popular 7.62x39 cases are made from steel, which will not work for reforming the shoulder.
The PK uses the 7.62×54mmR Eastern Bloc standard cartridge that produces significantly more bolt thrust when compared to the Eastern Bloc 7.62×39mm and 5.45×39mm intermediate cartridges. With the use of a single spare parts kit and two barrel assemblies the service life of the modernized PKM machine gun series is guaranteed for at least ...
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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)