Since this thread has been resurrected, I thought I'd weigh in with a stray thought. Has anybody but me noticed that certain shot angles seem to anchor an animal quicker? Memory is a fickle thing, but I recall having to track more animals that I shot broadside than those I shot quartering towards me where the neck meets the chest.

My experience may well be atypical. But it goes to the point of why I find formulas for killing power problematic. What's typical?