ORIGINAL: 98Redline
I am a big fan of the Winchester XP3 FailSafe.
They shoot great out of my .270 (your mileage may very), and have always put the animal on the ground. Some were passthrough, some were not.
Regardless of what ammo you pick, in a .270 Win, I would want a bullet on the heavier side for elk, something in the range of 140 - 150 gr. Not quite as flat shooting as a 130 gr, but with a .270 and elk, you will probably not want to take those really long range shots anyway.
To date I have tried 7 or 8 different ammo's in the past out of my Rem. Mtn. Rifle and have two other friends do the same.
We have come to the same conclusion that the .270 is best suited with 130 gr. bullets as the accuracy just isn't there with larger bullets. One buddy has a Weatherby (not sure of his model) and the other is a Winchester 70. Don't ask me, as it puzzles us all, but we stick with 130 gr to maintain accuracy. It's funny how every gun has it's own personality?
They shoot different bullets than I do because their guns won't hold any accuracy with my chosen load. Crazy!
As I mentioned in the other reply above, if I feel the need to have a heavier bullet, I would bump up to my .30-06.
130 gr is plenty for a broad side shot, not hitting a shoulder.