I cheat and use a hootchie mama for cow calls. I am not confident in my bull calls yet. I can often tell if it is someone trying to imitate bull calls. If I can, I'm sure a bull can as well. There is a another guy who posts quite often, I think he goes by elknut, he knows what he is talking about. It is not just calling, but saying the right thing. I am still practing before I try it for real on a hunt. Even without calling I have gotten elk four straight years (3 bulls and a cow). Two bulls and the cow were during rifle season and this year I got a 5x4 bull during my very first archery hunt for elk.