Keith, First of all I apologize for referring to the action as an 1871 it is an 1872, that's what happens when I haven't had my second cup of coffee.
That said this action/rifle is pretty well described in Winfer's book. Apparently it was rebarreled in .222 rimmed and passed London proof @ 17.5 tons. It also had a buttstock and forend also long gone. Wal might know where these items are but he, I believe, is very hard to reach. One other of these actions has I believe been rebarreled in ,22 hornet. The original caliber could have been something in the .310 to .360 but that is just a guess.
BTW, the 17.5 tons proof was from Winfer's book. I can't even imagine firing a cartridge in a rifle that small that generates the recoil that that must produce. I like my retinas where they are at! That must be a misprint.
Last edited by Doug Mann; 12/07/21 11:07 PM.
