The problem in mechanical heads is NOT inherent in the design. The problem is (and I'm not pointing a finger at anyone....unless it's ME) that most hunters don't know how to tune their bow/arrows correctly to shoot them (mech's).

An arrow with ANY BH on it....that isn't tuned....will sacrifice a LOT of it's energy, upon impact. Been there - Done that. The problem with mechanicals is.....you don't know you're not tuned, until you hit an animal. With fixed heads.....you'll know when they won't group.

I think anyone who's gonna shoot mechanicals....should tune to shoot fixed heads....THEN switch to the mech's.