Just a bit of a follow up, my friend up here in Idaho went with the .270 in part from Jack O'Connor who was a friend of his father. The 130 grain silvertip is also by Jack's advice. Here is a bit of the story from his website bio:
Quote:
The .270 Winchester became one of the most popular big game cartridges due to Jack’s promotion of it as an effective caliber for the average hunter; sheep hunting and sheep conservation became more visible to the average sportsman resulting in an awareness of habitat requirements that led to the establishment of the Foundation for North American Wild Sheep, the first of several species-specific similar conservation organizations; and sportsmen were much more aware of the importance of ethical hunting standards and professional game management to the continuance of their sport.
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http://www.jack-oconnor.org/biography.html