Well, depends on if you are a 2 blade guy or multi blade, I guess. I shoot them as 2 blade heads, but when Fred designed them, he designed the bleeders to be thin and to break easily when they encounter bone. The benefit of the bleeder is to open a bigger hole in the hide to allow for better shaft penetration and blood trail. When I have inserted the bleeders, they often seem to crimp or twist just a bit when I snap them into the recesses in the ferrule and I wonder how much effect that may have on flight. They are still one of the best heads ever made.