My father in law has a winchester model 70 .264 winchester mag. I called winchester and the serial number indicates that it was made in 1964. the problem: we mounted a vari-x III 3.5-10 x 50 with target turrets on it using dual dovetail leupold rings and bases. there is not enought adjustment in the scope to zero it at 100 yds. at the range, it was 12 inches low at100 yds. I called leupold and they sent me two shims. after installing the shims I put a laser borsighter in the barrel and now i can bring the laser and crosshair almost together. the laser (barrel) is still 1/2" lower than the crosshairs (at 20 yds) with the scope adjusted all the way up. I havent test fired it yet but if they are just coming together at 20 yds, how high will it be at 100 yds? will there be any adjustment left for dialing in at further distances? it will be 2 weeks before i can shoot it. (father in law bringing ammo at that time). leupold said each shim would give me 12 inches at 100yds so based on this i expected to be able to dial the scope where the laser was quite a bit above the barrel. any suggestions would be very much appreciated.