.223 if I am saving hides and .260 if I am not saving hides. I read your other post and the .223 will take our big northern coyotes out to 600yds with the right bullets. I do not need to use more powder in a 22-250 or swift to achieve the same dead coyote. I also like my AR15s for hunting and the other bigger 22 centerfires are to long for the AR platform. I do not feel the .223 give up anything to any of the other common 22 centerfire cartridges.