Don't know if this holds true for #5's - I would think it's a different sight radius.
From my notes:
All adjustments are made to the front sight beginning with elevation, because to correct up or down the front sight may have to be replaced with a different height. It makes no sense to get your windage on, only to have to replace the front sight to correct for elevation.
Zeroing at 25 yards, using the micrometer sight set for 200 yards, the Mean Point of Impact (MPI) should be 3/4 of an inch (plus or minus 1/2 inch) above the point of aim (POA).
Zeroing at 100 yards the MPI should be 3 inches above the POA.
Remember there are nine sizes of foresight available, each being .015 of an inch different in height. Each change of foresight to the next size, up or down, will change the MPI, up or down, 1/2 inch at 25 yards and 2 inches at 100 yards.
To correct high impact, replace front sight with a taller one, to correct low impact use shorter blade.
Examples:
Using a rifle fitted with a .0 front sight and firing from 100 yards, it produces a five round group 4 inches above the center of the bullseye. Then replacing the sight with a .030 blade will drop the MPI 4 inches, or
Using a rifle fitted with a .075 front sight and firing from 25 yards, it produces a five round group 1 inch below the center of the bullseye, then replacing the front sight with a .045 blade sight will raise the MPI 1 inch.
