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The 7.62×54mmR is a rimmed rifle cartridge developed by the Russian Empire and introduced as a service cartridge in 1891. Originally designed for the bolt-action Mosin–Nagant rifle, it was used during the late tsarist era and throughout the Soviet period to the present day.
Common rifle cartridges, from the largest .50 BMG to the smallest .22 Long Rifle with a $1 United States dollar bill in the background as a reference point.. This is a table of selected pistol/submachine gun and rifle/machine gun cartridges by common name.
The below table gives a list of firearms that can fire the 7.62×54mmR cartridge. The cartridge was originally developed for the Mosin–Nagant rifle and introduced in 1891 by the Russian Empire . It was the service cartridge of the late Tsarist era and throughout the Soviet period to the present-day Russia and other countries as well.
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.
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. [5]
Calibers in the size range of (mm, inches): 2 mm (.079+ caliber) 3 mm (.118+ caliber) ... Table of handgun and rifle cartridges; By name. List of Winchester Center ...
The confusion is based on difference in rounding out (rounding up or rounding down) the case length (case length of our cartridges is 53.65-0.2 mm). The letter "R" indicates a case rim. After Russia’s joining European Commission (ПМК) a definite name of this cartridge was determined – 7,62×54R.
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 ...