It's more difficult to get pass throughs on turkeys than it is on deer with any head because turkeys are physically light and are moved by and with the arrow at the arrow's impact. The heavy feathers do a pretty good job of spreading and absorbing some of the arrow's energy, turning it into a push on the turkey's body, and because the turkey only weighs 25 pounds or so (balancing on stilts/long legs), the arrow moves its body in the direction of travel, reducing penetration. A 150# deer may jump the string, but the body isn't moved by the arrow's impact. That's why the arrow more easily passes through. The bigger the head, the less penetration, all other things being equal. Regardless, most any head, if it's sharp, is usually enough for either critter.