One of the mao reasons to use a WSM is for the rifle wrapped around it- like a Montana or my BLR. When you can get WSM performance from a light short handy rifle, you've got sumptin'.
If you DON'T get the lighter shorter handier rifle you are left with a little less power, and a little less recoil than the 338 WM. I would agree that's probably not enough reason to get me to choose the .325 over the excellent 338wm.
