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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.
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 7.62×54mmR remains one of the few standard-issue rimmed cartridges still in military use, and has one of the longest service lives of any military-issued cartridge. [1] This table is sortable for ...
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 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 ...
The 7.62×53mmR cartridge remains in military use to this day, although it is now only used by the 7.62 TKIV 85 sniper rifle. [citation needed] PKM machine guns and other Russian weapons in use by the Finnish Defence Forces use the 7.62×54mmR exclusively.
The original can be viewed here: 7.62 x 54 R.jpg: . Modifications made by Tsaitgaist . This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license.
The test cartridge must be inserted into the chamber in such a way that the hole in the test cartridge case lines up with a gas port hole that channels the gas pressure from the cartridge case to the face of the sensor. The measurement accuracy of the pressure measurements with 21st century high-pressure sensors is expected to be ≤ 2%. [7]
The Zastava M91 is a semi-automatic designated marksman rifle chambered in 7.62×54mmR, developed and manufactured by Zastava Arms company in Kragujevac, Serbia.Like its predecessor, the Zastava M76, the M91 is internally based upon an elongated version of the AK-47 design, but the M91 shares more external similarities with the Dragunov sniper rifle than the M76.