Read all of the ballistics tables you want.Then sight the rifle in at whatever height above zero you choose at 100 yards,be it 1-1/2" high or 2" high.Then shoot the rifle at 200 yards and then 300 yards and you will know for sure exactly where the point of impact is.Ballistics programs and tables are only theory,and blindly trusting them has resulted in many people wounding or missing game.