My good friend lives in Montana. He ONLY uses a 270 for Elk. Then again... He won't take a shot unless he's CLOSE, and then ONLY in the neck. He carries a .44 on his hip in case a bear or Kitty Cat decides it'd like Man for dinner.
He never takes a body shot with a 270 as he doesn't trust it to hit an Elk's rib or shoulder bones without the risk of breaking apart, deflecting, or not passing into the second lung. All of which of course lead to a wounded animal that can RUN FOR MILES before dying.
With a 270 it should be Necks or Nothin.
Just my .02 cents.