I'm looking at a Kimber Montana in WSM as my long range gun.
Would you get a 300 or 7mm WSM, and why?
Long range, as in deer at 300 yards? Then its flip a coin.
Long range, as in Moose at 200 yards, go with the .308 cal bullet.
I would go with the 300 WSM as it seems to be the most popular of the Short mags (and thus, the easiest to re-sell, get ammo for etc.).
BUt, that is just me.
Stick will tell you to get a 7 shamu, but that is just because he is contrary.
Good shooting, you really can't screw up with either.
BMT