While I have fired heavier calibers such as the .600 and .460 Weatherby, being mindful of the necessity to be in better shape than the quarry after the first shot is fired, I have therefore not taken the risk of hunting elephants continually with these calibers. Standing 5 feet 11 inches and weighing 168 pounds, I have never felt inclined to subscribe to the great Elmer Keith’s theory of ‘the bigger the bullet, the harder they fall.’” –John Kingsley-Heath, Hunting the Dangerous Game of Africa