So I had my new Trail setting at 50 yds and was hitting the handwarmer dead on. I then set the scope to 100 yds and moved target to 100 yds but couldn't hit the target backing. So I went back & set the scope to 50 yds and shot at the 100 yd target. Does anyone have advice on where I'm messing up or how to get the scope zeroed at the 100 yd setting? Thanks!