I did my Rossi Youth 22/410 combo. I reamed the 22lr barrel to 22 Mag and stubbed the 410 barrel using a Savage .223 takeoff barrel and chambered it in .22 Hornet. Will use it for my Arizona Coyote rifle, there are places where I have my winter home that only allow RF hunting, so I can use it in the RF or CF Coyote areas. Mine worked out well, the RF barrel was tight, but the Mag reamer pilot fit and the CCI Mags shoot well out of it, and it didn't blow up, so I think things are good. The Hornet barrel is really nice, and the whole rifle with a scope weighs 4.4 pounds. Larry