- Joined
- Nov 14, 2006
- Messages
- 998
As state above, I have an SP101 that I'm trying to iron out some leading issues on. I can easily slug the bore, but there are 5 grooves on this gun and I'm having a difficult time measuring the diameter. I am an engineer and have PLENTY of time spend behind a caliper an micrometer but without using an indicator and fairly elaborate setup I don't get how to measure the bore diameter on this one. I can measure from land to groove on the slugged bullet (.353") but without knowing my exact groove depth, I can't calculate bore diameter.
I'm sure there is a very simple method, but I can't think of it...
I'm sure there is a very simple method, but I can't think of it...