I put a scope on my sig 556 and went to the range this morning to zero it. well to make a long story short i ran out of elevation and im still 2 inches low at 100 yds. now my instincts tell me that the design of this rifle has a lot to do with it being the barrel is 2 to 2.5 inches below the cross hare's i have room to use 1/4 inch lower scope rings. which i do believe would bring my cross hares down resulting in the elevation of my point of impact? i didnt try to shoot at 150 or 200 but for some reason i think it will be way high. anyone have any sugestions, am i on the right track with my next move of remounting the scope with lower scope rings?