Yes I did some deflection testing using a fresh deer hide and some luon board. In a nut shell I found the head will deflect, just as a muzzy or any other head will. The slick tricks started a little earlier than some other heads with a less steep blade angle, but not a great deal. When the heads began to " skip" off the target the shot angle was to steep to be ethical anyway. If you take proper shots and tune your bow the slick tricks will work very well, and they are super accurate.