So does anyone have any advice for finding top dead center on a shotgun barrel so I can drill and tap for a front sight bead? Basically, I've got two shotguns that I shortened the barrels on, and I want to install beads, but can't puzzle out how to mark/punch/drill/tap a hole so that it's (more or less) perfectly centered and not cantered one way or the other. Brownells USED to sell a top dead center punch, but it's been discontinued and can't find one anywhere
Tips/advice would be appreciated.
Tips/advice would be appreciated.