I must admit these heads have interested me; however, logically thinking, they would be expensive to experiment with. I have read of bent blades on pulling.

I feel that the statement of " screw em' on and go hunting" is not good; Encouraging people that they needn' t tune their heads tells me the company has little regard for the game it is intended to take.

Anyone with respect for their quarry will ensure that they are capable (i.e. tuned and ready to shoot) of quickly and humanely dispatching the target animal.

Also, NARC...am I missing a part of the KE equation? What does fixed vs. mechanical have to do with KE? Please explain.