Mosin-Nagant Factory Pressure Test Rifle
This video showcases a rare Mosin-Nagant rifle specifically designed for factory pressure testing using the Copper Units of Pressure (CUP) method. It details the specialized apparatus, including a drilled chamber and a piston-anvil system for compressing copper slugs. The discussion highlights the difference between CUP and PSI measurements and examines the rifle's historical markings and condition, emphasizing its unique value.









