I own a Remington 270 WSM I have always shot Remington core loc but today I went to the range to site my 270 because I put new rings on it. I talked to one of the worker there and he swears the the best round out in the market place for deer and elk is the Win XPS super elite.
It is one of the best hunting bullets made period but not needed for anything but very large game. I have always had good results with them in their former self which was the failsafe bullet. All it ihas is a new tip and they changed the retainer on the rear core. I would look at the TSX as well in a 270 WSM or the new tipped TSX if you buy Federal ammo.