first of all, a turkey will gobble at most any sound most any time, horns, duck calls, squeaky gates, farts, you name it. in mostly western kansas i have found for the most part, owl calls are a joke, they barely work. i think causes of the habitat, like draws, and large trees, there are owls absolutely every where and in fairly large numbers. i use a crow call, cheap and do a wonderful job, maybe cause there are few crows, don't give turkeys too much credit for being smart, just make a noise

cheers