We use them on hogs down here in Florida so we can get a bloodtrail right away. That fatty skin on pigs likes to seal the wound with regular heads and if you don't have blood right away you lose them fast in the heavy brush. Without a direction in the first 15 yds, they disappear into the palmettos and it's like finding a needle in a haystack. The game trackers seemed to work best for us because it has an almost full size two bladed with an expandable behind it. Unbelievable blood, but you do sacrafice a little penetration. I'd rather have them run a little further with a good trail though.