Paul - it was an attempt at being funny...
This ten , by Julia's admission, is a re-stamp. The "R" denotes reproof. These are modern proof marks. If it ever was made with a 3.250" barrels, which I doubt, there would have been an "LC" on the flats. This chamber would have been made for 2 7/8" case. 8 drams of powder would have easily fit in the smaller case.The 3.250 bore out was done to shoot modern shells. I have a H&H 10 game gun reproofed to 3.25 .
Does this gun have a long top strap? Do we know if the barrels are rifled? Two big questions. I'll try and call today.
JAZ