Mine was dead on the first shot. My gun shoots poa at 30 yards with the bead. I put my gun in a rest and put the bead on the center of a target 30 yards away. I have a rail on the gun so then I put the red dot on the rail and adjusted it so it was centered on the target. I took the red dot off and checked to make sure the shotgun bead was still centered. Put the red dot on and it was still centered. Checked with bird shot and bingo.