Videos tagged with Barrel Wall Thickness

This video demonstrates how a master gunsmith uses a specialized bore gauge to measure the internal diameter of shotgun barrels at a specific point (9 inches from the breech face). It emphasizes the importance of checking bore size and wall thickness for safety and legal compliance, particularly in regions with proofing laws. The instructor also explains how to interpret proof marks and their historical context, highlighting the differences in regulations between the UK/Europe and the US.

This video details the critical process of measuring shotgun barrel wall thickness, a key factor in determining a firearm's safety for modern proofing. Instructor Jack Rowe emphasizes a minimum acceptable thickness of 20,000ths of an inch, with 25,000ths being preferable. He also explains how to interpret proof marks, distinguishing between black powder and nitro proofing, and highlights historical practices that could lead to thinner barrels.