I have 3 350 uppers with picatinny rails which I put on AR receivers. Added 3 x9 Leupold scopes to each one. Went to the range with them today. They functioned mechanically great but .......... they all shot better than a foot high with the down adjustment maxed out. How can I remedy this. I used high rings because they fit my comfort level. Is lower height rings the remedy or is there another way.