RE: I'v narrowed my search
338, as long as the game is whitetails and the range is under 300 yards, there isn't any difference in any of the WSMs or any .300 mag or even the standard .270 or .30-06 for that matter.
I like the 7MMs over the .270s because they can handle the 175 grain bullets for much bigger game.....but you said whitetails only.....Go for it.