All else aside, the recoil will be about the same as the 375 RUM. As we recall, for every action there is an equal reaction. If its ballistics are close to that of the RUM, then recoil is going to also be simular. Whiole the recoil will be quite a bit less than the 378 W., Its gonna be within a couple ft lbs of the RUM. In a light rifle, it won't be pleasant. The recoil of the old H&H is mild in comparison but I once put a bunch of rounds through a 6.5 lb 375 H&H and the recoil was substancial.

All this is fine if you need that kind of power but not worth it to me if I don't.