Just curious as to what you mean by this. I've hunted with both mechanical and fixed blade heads and killed game with both. Unfortunately, I've also lost game with both. When that has happened it's always been user error and not equipment failure. I think a lot of people try to blame their mistakes on their equipment and many times mechanicals take some blame. I don't know if this is what you are implying, but if it is I have to disagree with you. Any ethical shot to the vitals with any sharp broadhead will bring down your quary. Some people try to get lazy with tuning and then find a scapegoat when they lose game on a poor shot. If you were implying to do the critters a favor and make sure the bow is fully tuned then I agree 110% and apologize for the rant, but if your saying mechanicals are inferior to fixed blades I'll have to respectfully disagree.