This video details the complex process of fabricating a new mainspring for a vintage Marlin Ballard No. 2 Sporting Rifle. It covers diagnosing misfires caused by a weak spring, disassembling the breech block, and precisely shaping new spring stock from annealed steel. The process includes critical heat treatment steps of hardening and tempering to achieve the correct spring properties and a blue finish, along with safety repairs like deepening the half-cock notch and muzzle recrowning.
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