I have a brand new out of the box Sightron SII 4x16 mil-dotscope and when I change the magnification the impact point seems to change. I am also changing the paralax adjustment to the yardage and it still changes! Its a real P-I-T-A to have to leave an almost $400 scope on one powersetting! Oh yeah, this is the second one! The first got sent back for the same issue. I went through 3 boxes ammo trying to sight the damn thing in!