I use The Can bleat call and I've had good success with it. For me it's brought in curious deer, buck and doe. i've never had a big buck come into it tho. I shot an Ohio 8 point a few years back during Archery season, it was running across a field, I hit the bleat can and the buck turned around and ran right into my set-up. Seems to work good to get deer curious more than anything.
-Jake