Then you tell me what then lol, it wasnt one 20 min growl, its was i large number of growls, over and over then stopping and going over the course of 20 min. funny until the calls came out on the market i have never even heard of it, and if researchers did why didnt they invent a call and make some money? And by the way the 6 point i watched chasing 2 does around the day before, was grunting over and over for well over 3 min while i watched him lol so i dont know what to tell you bud, get in the woods more

P.S.
Does T.R. Michels answer all your questions for you? LOL seems to by all your posts