I have never used any mechanical broadheads ever since I was cutting up a deer and got sliced by a blade that was stuck in the shoulder of a deer. After digging around some more,we found the restof the head. Thehead never opened fully. I still have that head as a reminderof what to watch out for. Ihave neverfound afixed blade in a deer and I have been butchering deersince 1993. Did it for a living for a few years nowI do it only for family.Over the years I have recovered more than 30 mechanicalheads in deer. Keep in mindmore than 75% ofthese deer were all shot during thegun season and had mechanic heads stuck in them. Im sure that when a shot is placed right with a mechanical head the damage is devistating. But they are just another thing to go wrong on that buck of a life time. Just ask a friend of mine who lost a 200 class buck a couple years ago because the mechanical head never opened. Just my two cents. Im sure they have imporved some over the years, but again, still another thing to go wrong in my book.