I was looking for a long range base to put on a model 7 action custom build I just got finished.It is a 6.5 Creedmoor and for now I have a 6.5-20x40 VX3 on iy with weaver base and millet rings.I usually shoot 100-200 yards but am in the process of getting permission to hopefully shoot 800-1000yds.What will the 10moa and 20moa do to me at 100?Which the rings I have now have the scope off the barrel pretty good.Even though I have shot some great groups something about that shim in the back on the weaver base is hard to put confidence in.Anyways let`s see what the pros have to say?