I put a 20 moa egw scope rail on my dad's 10/22. It has a vortex crossfire ii 6x18x40 scope using warne steel medium height rings. At 100yds the scope has no more vertical adjustment, you have to aim 10 inches high. The scope has 50moa of adjustment. I'm confused. I thought the 20 moa rail would help the scope not use as much of its internal adjustment. Should I put a 0 moa rail on? Shooting standard velocity ammo. Thanks for any help.