I shoot a .300 Weatherby Sako 75 and I can tell you, I appreciate the extra weight.Then again I don't hunt out west and don't have to tote it around very much. Honestly, if I had to do a lot of walking, I'd probably want something a little lighter.

As far as the .300 Win versus .300 WSM is concerned, I've never owned either one, but I know they're very similar in performance. The WSM appeals to me simply because of its newness and because it doesn't have a belt. Lately I've developed an aversion to belted cases for some reason and want to eventually get away from them altogether. There's no logical reason for it, just don't like the way they look I guess.