If a rifle is dead on at 25 yards, but is + 7" at 100yards, if we lower the point of impact at 100 yards by 5", to give a more reasonable +2" zero, it would also lower the point of impact at 25yards, to approx -5" ??
The entire trajectory does not move down as a unit. Think of the trajectory as pivoting at the muzzle. A five inch change at 100 yards will be a much smaller change at 25 yards.
Bruce
