Have used the .240, .257, .270, 7mm and .300 Weatherbys on big game, and those from .257-.300 on animals from pronghorns to elk. Have used the .257 and .300 in several rifles.
Prefer the .257, as its plenty for any legal big game in Montana, recoils about like a .270 Winchester, and in my experience is extremely accurate, whether in custom or Weatherby factory rifles.
Here here. I have owned a few and all of the 257's have been death rays on everything up to elk. I wish they were not so hard on barrels but man they shoot and kill well.
