The 7.62×53mmR is a rimmed rifle cartridge developed in the early 20th century, primarily used by the Russian Empire and later by the Soviet Union. It was designed for use in the Mosin-Nagant rifle and is known for its accuracy and effective range. The cartridge features a bullet diameter of 7.62 mm and a case length of 53 mm, making it suitable for various military applications. This cartridge is notable for its historical significance, as it was widely used during both World Wars and in various conflicts throughout the 20th century. Its design has influenced other cartridges, and it remains popular among collectors and enthusiasts of military firearms.