#7.62x155mmR
Experimental Scaled Up Anti-Tank Mosin-Nagant Rifle
In the late ’30s, Soviet Union started to experiment with anti-tank rifle designs. One of the design approaches was to make a normal caliber (7.62mm) cartridge with an enlarged case capable of holding enough powder to accelerate the 185-230 grain projectiles to high muzzle velocities of over 1,000 M/s (about 3,300 fps).
