SUCCESS!!! Got my gage pins yesterday. This AM removed 5 small dents from a set of 16 G VHE barrels. I didn't weld to drill rod or additionally bevel the already slightly beveled edges. I used progressively larger pins driven by a 1/2" wood dowel. Tapped barrel area (with final insert pin) with small brass hammer. Thank you all for sharing the concept and technique!!!
Bob Jurewicz