This looks like a forum that might get me going in the right direction. I have a Marlin .223 X7VH with 26 in a heavy barrel, with a 1 to 9 twist. I changed out the plastic stock for a nice maple one. I have a 10x40-50 Barska scope mounted on it. Scope has a mil-dot reticule and one eight moa tower and windage. I am shooting a Sierra 69 grain HPBT Match bullet, pushed by 21.8 grains of IMR 3031. I get 1 moa groups at 100 yards. The problem: I have an abundance of room on the tower. All for short yards and very little below center. the minus numbers for long distance. Have I got the scope set too high? It's at 1.8 inches high.