I know this is not a low $ solution to obtaining the slugs needed for determining barrel and throat dimensions, but has anyone tried drilling a blank mold for various size slugs? Per the following link:
The molds are fairly pricey considering that there is little or no machining on them. I've never tried drilling a piece of wood or other material to cast slugs. What size drills work best for various calibers?
I don't know why my computer is inserting a dollar sign instead of ampersand.