Sometimes when you are in your stand you start thinking why? I have taken a lot of deer, moose, carabou, turkey, rabbits, squirrels, raccoons, you get the picture. Well I will speak of only 3 deer shot through the ribs, lungs heart, that area. All shot with the same bow and same bh. First one: arrow went through stuck in the ground deer did not move, I really mean he did not move. Fell over like a 3d target, legs stretched out, finally went limp after a minute or so. Next one: through and stuck in ground, deer jumped 180 degrees and walked over to the arrow and smelled it, keep feeding until dead. Third: through stuck in ground, took off like her feet were on fire. Slid five or so yds dead on the run 200 or more yds from where I shot her. No two deer react the same, close but not the same. I have had some that Stevie Wonder could follow the blood trail and others a drop here and there, why, don't know. Just keep shooting and praticing, get someone that knows about tuning, and have some help in getting your bow tuned for bh's you will have more speed, and your bhs and field pts will hit the same.
Best of Luck to you!