This video demonstrates an expert gunsmithing technique for performing a chamber cast on a rare Galland Revolver to accurately identify its caliber when ammunition is unavailable. Mark Novak meticulously details the disassembly, the use of Cerrosafe alloy for casting, precise measurement techniques with Lyman calipers, and even a specialized screw head repair method. The process successfully identifies the revolver as chambered in .44 Russian, highlighting the importance of objective measurement over assumptions.
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