A good cut on contact. I'd suggest Magnus Stingers/Stinger Buzzcuts. SUPER sharp, and when the bows tuned correctly, they fly with field points
I do solemnly swear that I will support and defend the Constitution of the United States against all enemies, foreign and domestic; that I will bear true faith and allegiance to the same. So help me God.
without knowing your draw lenth, i'd stick with a cut on contact head similar to what was first mentioned for hunting most all of your big game. mechanicals will most likely work great on turkeys with your setup though. if you have a longer draw length you could probably get away with using small cutting diameter mechanical heads.