I've killed elk from 20 yds to 650 yds with copper bullets and a 270 Win. In your list, 6.5 PRC would be my choiceI am looking at the 6.5 PRC. I am just concerned it will not do moose or elk as well. I do love my 6.5 PRC I currently have. It is basically a 270 Win Mag. For some reason I have a hang up about it for elk. I do not know why. It is just not what I pull out for elk. Plus after one Brown Bear encounter I am a little nervous about carrying that in Alaska. I hope to be in Alaska at least every other year.