Zwickey heads have always worked for me and penetrate like no other. I shoot 125 grain Eskimos on 11/32" cedar shafts out of my 52# Palmer take down recurve. Blew completely through my 500 lb. black bear that scored 20 2/16". He's now a standing, life size mount in the living room and couldn't be prouder of him. When I want to cut a BIG hole on elk, I shoot Wensel Woodsman 3 blade heads. Those beasts are wicked.