It's a 30 Carbine chamber as I recall. Looks nice and should be fun even with cast bullets as near to 32-20 type velocities. I can see a real handy Handi there. Makes me want to find a little 12" Pratt & Whitney engine lathe and start playing. Ed Harris had a H&R converted to 32S&W Long and ran some lead bullet loads for squirrels and other 4 legged persona non grata.