Well, I helped a neighbor of mine set one up and when he went hunting with his buddies. The previous year he was have problems on running or moving shots. They kind of scoffed at this and made snide remarks. That afternoon, he took a nice buck at 80yds. or so he claims. His buddies just said it was luck. They are great optics for slug-guns, once you understand what they are capable of doing. .....because all my huntin friends use scopes or beads but i will have to look into it