I've thought about that, since I reload, it's not an issue, I'll just load the Casull or 460 to Colt levels if that's an issue. Those that shoot factory ammo may have issues with it, but the 357maxi clan shoot 38spcl and 357mag in their 357Maxis so, I don't really see that as a problem, particularly with the Colt in a Casull chamber, there's only ~.100" difference in case length, some H&R rifles have way more freebore than that and shoot very well.
Wayne has to rent either reamer, so I just have to decide which way to go, the cost of brass is quite a bit higher for the 460 at $53 a hundred compared to $31 for the Casull, dunno yet, need to do more thinkin on it, the Casull will actually do all I want so....
Tim