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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 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.
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)
Compared to the 6.8×43 mm Special Purpose Cartridge, another round made to have increased stopping power over the 5.56 NATO, the 300 Blackout has different capabilities. The 300 BLK was designed with a specific shorter-range focus to have equal or more energy than the 7.62 Soviet and work reliably with suppressors.
It is a multi-purpose mid-power cartridge with increased ballistic performance over the AR-15's traditional .223 Remington (5.56×45mm NATO) cartridge. The use of a modified 5.56 case means that at minimum, only a new barrel is needed to convert any 5.56-based firearm to .277 Wolverine.
Therefore the Taylor KO factor for the 7.62×51mm NATO cartridge is 17.7. For metric values the calculation is T K O F = M a s s × V e l o c i t y × D i a m e t e r 3505 , 55 {\displaystyle \mathrm {TKOF} ={\frac {Mass\times Velocity\times Diameter}{3505,55}}}
They can be chambered in 5.45×39mm, 5.56×45mm NATO and 7.62×39mm, and use a barrel and gas system assembly and iron sights line similar to that of the AK-74M/AK-100 rifle family. Improvements added from the AK-12 include Picatinny rails , a new pistol grip, a new adjustable buttstock and a new flash hider. [ 14 ]
Improvements were made to the initial design from the 1970s which made the rifle capable of handling more powerful cartridges such as the .308 Winchester/7.62×51mm and the more prevalent .223 Remington/5.56×45mm, 5.45×39mm, and 7.62×39mm calibers. These improvements contributed to the modern line of the Saiga rifles being adopted by many ...