How to Pour a Chamber Cast Presented by Larry Potterfield | MidwayUSA Gunsmithing
This guide details how to perform a chamber cast using Cerrosafe alloy, a technique demonstrated by Larry Potterfield of MidwayUSA. This method is crucial for accurately identifying the chambering of older firearms, like the Remington Rolling Block rifle discussed, when original markings are unclear or absent. The process involves cleaning the bore, plugging it, melting and pouring Cerrosafe, and then measuring the resulting cast to determine the exact cartridge dimensions.











