I set mine at no 1 on the rear sight. Then shoot at 25 yds to adjust windage. Then go to 100 yds to adjust elev. Still set at no 1 on rear ramp. I prefer it to hit one inch high from pont of aim so bullet drops dead on the bullseye at 150 yds. And furhter drops 2 inches low at 200 yds. Since i only use it for close range , this is perfect for me. ANything within the 200 yds is within the killzone.