I don't see how a high FOC is going to impact how much KE an arrow uses upon entry of an animal. FOC is all about flight stabilization and how hard the fletching has to work at keeping the arrow on a straight path. As I mentioned, an arrow will flyheavy end forward. Period. Don't think so? Shoot an arrow that you KNOW is more heavy toward the nock end. I promise you it's going to flip over in flight. The closer your FOC is to 0, the harder the fletching has to work at keeping the arrow in a straight line.

Unless my thinking is completely warped, once an arrow enters the body of a deer, it HAS to follow the broadhead. KE and momentum are what moves that process along, not FOC. Again, FOC is allabout stabil flight.