AGW agreed on the 270 Weatherby being an excellent choice for a mountain rifle particularly in the hands of one that has practiced at ranges it's capable of sending a bullet downrange with energy to spare.
had a client take a very nice ram at an honest 400 yards, it was that or there wouldn't be a shot, I was a bit anxious about it, but he'd practiced with the rifle and during sight in at base camp had demonstrated very good proficiency with his setup.
he got er done, though I think it had helped the year before he'd wounded a ram and it made him diligent on his practice upon returning home. I was impressed with what it did that day.