Here is the latest casting of the chamber. I had a hard time as if I went to deep, it would not come out. I put a mark by what appears to be the top of the casting as the rifling starts just about the ring on the casting, you can see the start of it if you look close. I took a file to the breach area of the barrel. There is a definite ring around it as can be seen in the pictures, but the material in there is steel. I am trying to contact a gun smith. Any ideas now???
Lyle