In the book Wildcat Cartridges, page 20, there's an article that talks about a .17/223 that Vern O'Brien (gunsmith) took to Alaska. His guide bet him he (the guide) could shoot and kill a grizzly with it. 2 shots to the head with a thin jacketed bullet, and the 10' 7" grizzly won him Vern's .17 rifle.
