I agree that the 270 and 300 WSM's are here to stay. I don't look for the 7MM WSM to fly very far. Sales of that one where I live are right next to Nil. As far a any big advantage of the WSM's I don't see any. The performance edge really isn't there and how much weight difference do you really get? Not much. Any weight you gain, you will gain back in felt recoil. While they are good rifles, the hype given them by Winchester is a lot of the reason they are selling well. Hype which in a large part is just not fact. Winchester is promising the old free lunch ploy and you don't get many of them. I would not discourage anyone from buying one but if you have used the 300 Win Mag and think that buying the 300WSM will improve your hunting performance, you will be disappointed.