You don't have to rechamber for 360 DW (probably). Mine and others have throats long enough from the factory. I haven't tried Max brass in mine yet.....but it is PRETTY long.
I am shooting 140gr XTP and the recoil is noticeable, but not anything to right home about. I know that I am firing the DW loads. The 38's barely move the muzzle. The 357 Mags can be felt, about a 223 or so. The 360 DW is about at 243 level, but not as fast of recoil, more like 410 shotgun.
In my opinion.
I dig the 360 DW loads, going to try 158 SP's next probably. I went with 140 XTP for lightest possible recoil for child, but I don't think that the 140 XTP is going to break a bone very well.