Dull broadheads are fine for turkeys. Like Bullmoose said, you don't care about penetration on a bird. Wasp made(may still) broadhead that had what they called"turkey spurs". All they were were Wasp heads with littlehooks at the rear to slow penetration and tear flesh. Field tips with adder points are used all the time. You are looking for theshock, and penetration to go at leasthalf-way into the bird. Shooting completely through a bird doesn'thelp like it does on a deer or elk. Just hit the spot.