I have used one to some success in the past, although I have had better response to a grunt. Last year I had a HUGE 8 point come in to the horns and then hang up across the creek. I dug out my can call and tipped it once and after the bleat come out, he turned and ran away. A couple weeks later, I spotted him again and grunted and rattled, trying to bring him closer. He would stop and stare, but not move in my direction, so again I tried the can call and for the second time, he took off in a run in the opposite direction. So being a bit slow, but not stupid, I didn't use the can call on him anymore. I did have two more encounters with him and had one of those times at less than 10 yards, but he was facong me and then quartering to me and never gave me a good shop angle. Biggest 8 point I have ever seen in the wild.