I was given a 1967 Winchester 30-30 from my dad. I took it to the range to shoot a box of rounds. I could not get the sight picture right. Talked to a guy at Winchester and he told me to set the bead in the bottom of the groove. Impacts were low. I raised the rear sight to the highest setting and I was still very low from center. Does anyone know how the sight picture is supposed to be with this rifle? Thanks for any help.