Ken61. I have seen my fair share of guns someone used a dremel on and this does not appear this was the case, at least from what I can see.

Dogfox, I am using a Skeets bore gauge for the measurement. After your comment I rechecked the measurement and found out I wrote down the choke dimension in place of nominal bore diameter (which is .658 and I corrected in original post), thank you for bringing that to my attention.

Hammergun, I would agree the finish on the gun appears to be original

2-piper, from what I could find it was my understanding that the Sterlingworth came with 2 1/2" chambers and 1/8" shorter was not uncommon. Although I am using a flat Blade chamber gauge and eyeballing it. Going to have to try marking the gauge and measuring it. I agree if there is a taper to the chamber it will effect the measurement and may need to try another way of measuring.

B. Dudley, based on the finish looking original that was my thought..

Thanks all for the input...

WBLDon

Last edited by WBLDon; 05/02/17 08:43 AM.