I bought the .270 WSM and LOVE IT! I wouldnt trade it for any other rifle. it seems to have all of the right stuff you would want in a great all around gun for around here...in my opinion that is, and to add about that .338 that is overkill for around here, I understand if all you hunt is moose and elk and bear but for a deer at 75-200 yrds thats just too much energy.
But whatever works for you.

By the way the group with the 270wsm at 100yrs was 6 shots that covered a quarter to 50 cent piece.