Subtract bullet diameter is very optimistic - none of your holes will be that big. It's *much* more accurate to measure from the outside of one hole to the inside of the opposite hole.
Probably so, which would explain small discrepancies that can be detected in my caliper photos. Initial measurements as reported in my first post were made outside-to-inside.
I placed the calipers in this manner for photographic purposes because it seemed like it would be easier to discern good caliper placement. No deception intended!
Don't be the darkness.
America will perish while those who should be standing guard are satisfying their lusts.
