For that project, Wayne told me he wants a 22 Hornet barrel to start with. The barrel must fit your reciever, of course, so you either buy a Hornet rifle, or you send Wayne your reciever so he can fit the barrel to it.
It seemed to me about a $400 dream project on a $250 rifle. I really, really, want a 250 Savage, but at that price I will most likely have to forget the dream, and just get a 243 barrel fitted to my receiver by H&R. ( I can just keep telling myself "a 243 is almost the same as a 250, a 243 is almost the same as a 250...)