Depends. First you need to know the existing chamber neck dimensions. If the 22BR reamer has a smaller neck than the Savage chamber, that barrel will have to be shortened enough to cut a whole new neck. You'd probably want that anyway to get a new throat with little or no freebore. Often factory chambers have so much freebore that bullets seated near the lands will be only barely into the case. The .22BR has a fairly long neck compared to other .22's, which means more room to seat a bullet without going into the case. So unless you plan to shoot real long heavy bullets, I'd specifiy NO freebore. Then cutting the barrel that much, make sure there's no taper before where the threads would end.