I have a stainless Bisley in .45 Colt. Initially the throats were .4514(smallest). The barrel slugged .4511, as best I could measure it. It was obvious that the constriction was where the barrel threaded into the frame. I had the throats reamed to .452+. I had originally meant to fire lap the barrel but now am questioning whether that is needed.
My concern is that the boolit will be swaged down in the forcing cone and be a loose fit the rest of the way down the barrel. I plan to shoot it before doing anything more than has been done. Just waiting for warmer weather(Don't laugh, I'm a fair weather shooter).
Any advice?