Frank Glaser shot A LOT of animals, mostly Dall Sheep with the .220 Swift and thought it was about perfect for his purposes.
I have read Glaser's book several times, and having some experience with the .220 Swift on big game was not surprised--especially since North American sheep in general aren't hard to put down--and Dalls are the smallest of the subspecies. But Glaser did sometimes express a different opinion about the Swift and grizzlies.
I also knew an old "game warden" in Montana who's job often included shooting elk at night off rancher's haystacks. That isn't done anymore, but was back then. His favorite round was the .220 Swift.
