Ranch, now I'm close to askeerd. I don't think .40 cal qualifies as big bore. Also think it's kind of queer to use a 1.5" Unertl for elk hunting. Maybe, tryin' hard to visualize that I am.
You'll notice in the pic there is a breech seater on the upper tang? Hammerhead I bought it from used that but said he never could get it to work well. Duhhhhhh........
Mebbe I'll ask Rick to start a new forum for "Weird Old Guns".
Or just talk to Tex.