I am shooting an identical setup. Anschutz 1710FWT with Leupold 6.5-20X40 EFR, using RWS R-50, RWS Target ammo. However, I am using Leupold Rings on weaver bases. I ran out of elevation between turkeys and rams, however, a single shim took care of the problem. Was your scope zeroed before you mounted it to your gun? Someone else might have more info on the BKL rings, the only ones I have used are the Leupold and Burris.