In his book THE HUNTING RIFLE, Jack O'Connor tells a story about a conversation with a professional outfitter who thought the .30-06, and similar cartridges, were too small for big game. O'Connor asked the guy if he'd ever seen any game taken with the .30-06. The outfitter said very little, since he'd always discouraged it's use.

“Montana seems to me to be what a small boy would think Texas is like from hearing Texans.”
John Steinbeck