Brass availability is really what drives the "will it or won't it" survive thing, long-term. It's why I'm bumming on 7 WSM; Winchester hasn't made more, and nobody else picked it up.
However, both 300 WSM and .270 WSM have aftermarket brass support. Plus, 300 WSM is very well-liked by the loonyiest of loons, the competitive LR guys.
Then there's the question of whether it survives as a cool thing on this FORUM... grin... it seems a group of curmudgeons like to opine that it turned out to be not as good as say 300 WM, plus short actions suck, so it was just a stupid idea from the git-go. I'm JUST KIDDING here curmudgeons! Stop waving those canes around menacingly! Actually I'm kinda not kidding. There is a tangible sense that the elders disapprove.
So if you run a WSM, you not only get the benefits of a short action, which are REAL DAMMIT!, and no belt, and more efficiency, you are also stickin' it to the MAN!
Long live the WSM's!
