This video addresses the common issue of a tight bolt on Mosin Nagant rifles, particularly the M91/30 and Finn M39 variants. The primary cause identified is peened metal on the bolt face catching the cartridge rim. The solution involves carefully using a punch and hammer to flatten these burrs, followed by light filing for a smooth action. The process is demonstrated on a Finn M39 and tested with dummy rounds, showing a significantly improved bolt operation.
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