Boinicrooster,....Bionicrooster?? <img src=icon_smile_shock.gif border=0 align=middle> Good handle, not sure I want to know the meaning but........
About the 'Hammerheads'.......These fall into the "Specialty" category as far as mechs go. They should be used by individuals with set-ups that are a bit above the norm as far as KE goes.
They are a large diameter , lever style head , and by nature this head demands a higher level of punch to get consistent perfomance on game.
If you could give me specifics about your set-up.....arrow weight, speed etc. I can take it from there, and give you an idea of how they will perform for you and what to expect.