Malachi Leviticus Blue
Member
I had not considered that. Would be interesting to find out but I'm not sure where I'd find someone with a bore gauge.
Loyalist Dave is spot on, most folks just measure the end of the barrel and think they have the answer.
The more important point is how it patterns with your load. You can open up, or tighten the pattern by adjusting your powder to shot ratio so decide what pattern you want and tune it in.