Pls. help a newbie. I have a zeiss 1000 conquest mounted on a Rem 700 5R using LaRue 20moa base with LaRue QD rings. I have plenty of elev. adjustment for 400yds to 1000yds. My problem is I have to use the 300yd reticle for zeroing at 200yds and the 350yd reticle for shooting at 100yds. The elev turret is cranked all the way down. Should I not be using the 20moa base and different rings to bring the scope lower on the rifle? Or, am I doing something else wrong?