Sat in the treestand hunting 3 large bucks since end of aug. Finally get a broadside shot at one of them and the arrow only penetrates 4 inches. I have been using mechnicals for the last couple of years this is the first time i have not put the arrow right through the deer. I did not hit the front shoulder because the front shoulder was out of my shooting lane when i made the shot. Afew things,there was some long grass between me and the buck didnt think it would be an issue though. Could i of hit a rib dead on and had the arrow deflect. Anybody have a thought on this. I am switching to cut on contact heads to hopefully avoid any futer problems. The only good thing is the animal will live.