How to Mark the Caliber on a Rifle Barrel Presented by Larry Potterfield | MidwayUSA Gunsmithing
This guide details an electrochemical etching method for marking the caliber on a rifle barrel, presented by Larry Potterfield. It emphasizes the importance of clear caliber markings for safety and explains how to use a stencil, electrolyte fluid, and an electric current to create a neat, readable mark. The process is presented as an alternative to traditional stamping, offering more professional results.







