I have the standard version of all the cartridges on your list. I love the Weatherby's, but using a .30-06 bolt face for a build, I would go with the .280, or 280AI if you like. I would want the heavier bullets and high BC of the 7mm round. If you had a magnum action, I would lean towards the .257 Weatherby. That being said, my current coyote and pronghorn rifle is a .240 Weatherby.
