I did ask the PH about the number of kills, and on what. He was prety familiar with the .416 as his boss (the guy who owned the safari company) used one. He himself had used the .378 a lot on buffalo and some on lion, and said it killed those animals quicker than the .460 in his opinion. But he was a little vague about the bullets used, since he actually isn't a rifle loony, and it may be his boss was using solids in the .460 and he was using whatever expanding bullet Weatherby loads in the .378 (along with solids to back them up on buffalo) and that may have been the difference.
