Quote Originally Posted by K31icon View Post
In my experience, a bore that looks pitted, but feels reasonably smooth when you run a patch through it, will shoot cast bullets alright. If it rips little pieces of patch out, forget cast bullets. A bore that rough also rips up jacketed bullets, and might be improved by lapping.

I never thought about the patch test - thanks. Shame on me!
I would have to be very careful about lapping - there isn't much rifling left as is.
The Carcano is the worst for shallow rifling.