To GMMAT... I am not one to tell you to switch by any means!! Your setup sounds about the same speed as mine, and I have killed plenty of critters with the non-cut-on-contact heads such as the Muzzy. My switching this year to a higher mechanical advantage head is a personal chioce that I am making in an attempt toovercomeby way of the laws of physicsany problems that I may not have control over such as a leg which is moved after I release that my arrow now has to go through to get to the vitals. I am hoping not, but the day will probably come when the choice of equipment that I am using will mean cleanly killing an animal or wounding one, so I would be negligent to the sport by not using what I feel to be the best broadhead for the situation. Please don'ttake my post above to mean that a Muzzy won't kill an elk...that's been proven year after year of elk in the freezer for many hunters, myself included. I merely am of the opinion that the higher mechanical advantage of a 2 blade cut-on-contact head is the better choice for me. By the way the mechanical advantage formula that I am using is: Length of cutting edge/(1/2 cut diameter x number of blades).