WB
I think the barrel is fine. My brass is thick.
Thursday, February 13, 2020, 22:51

The .30-30 case is about maxed out with the 10mm. Your chamber ciphering looks very reasonable. Almost straight but just a couple thousandths of taper. The chamber reamer shows 0.420 at the case base and a .30-30 case is only 0.418 measured there. Chamber tapering to 0.418 at the case mouth end. That allows for the mouth to expand out about straight wall for the .30-30 case upon firing and still be easily extracted.

I just plucked up a mix of old brass that did not seem to work well due to wall thickness at the case mouth. This is the fun part. I'll keep you posted on the next phase of play. I just have not gotten to it yet.


powered by my little forum