Thanks for posting that information Dean. Assuming the gun was a 12g, the end-of-the-chamber wall thickness is a bit surprising. How long were the forcing cones? I've measured a few vintage doubles with lengthened cones and it appears that frequently the chamber gets lengthened (as part of the cone lengthening alone) slightly. I have a Smith with lengthened cones that now has 3 1/4" chambers
The ONE damascus 12g Remington 1894 I've measured had 2 5/8" chambers, about 3/4" cones and end-of-chamber wall thicknesses of .107". 9" from breech was .058".
