I have a 300WM and like it fine. I don't think I'd ever buy or chamber a rifle in 300WSM if for no other reason than I don't much shoot the 30 mag I have now.
I often entertain rebarreling it but never have.
It's a Howaguard and quite heavy with a fancy lookin' blonde stock. Maybe I'll find a lighter stock and load up some 150ish x's or scenars.