Not disputing anyone here, but shouldn't an 1895 gun have the chamber marking for its original "Shell" size. I can conceivably see a 10/2 bore on either a chamberless 12 for "Thin Brass" or a 10 for ordinary brass shells. It is my understanding that not all guns bored for brass are done so to the same extreme as the chamberless guns. In either case the chamber mark should tell the tale on an 1895 gun.

Miller/TN
I Didn't Say Everything I Said, Yogi Berra