CD2...........Have'nt scored with a bow yet although I must admit I have ruffled a few feathers, missed several, and sad to say had what I thought were good hits but did'nt recover the birds. I shoot a recurve and 2blade Snuffers. What I can gather from on other sites most do not advocate mechanical heads unless it's used in conjunction with a high speed compound to insure good penetration. If the shots on target, I don't believe it would matter! By the same token, I know a young man who shot a dandy P&Y 10pt this year with a mechanical head. He shot it quartering to him for 20yds and the deer was actually 23. Naturally, he shot low and the arrow buried in the dirt. After examining the arrow, he found slight blood and hair indicating a hit. Well, he found alittle blood and took the trail. The arrow just creased the neck enough to let one of the large blades slice the jugular and he got his 155 buck! If he had used a fixed blade head, the deer would probably still be alive...go figure!!!....TF