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How To Use Table Below - Suppose a rifle, having a sighting radius of 24" between front sight and receiver sight, shoots 6" high at 100 yards, even with the rear sight adjusted as low as possible. Remove front sight and measure overall height, preferably with a micrometer. This might be .410", such as a Marble No. 41N. Reference to columns for 24" and 6" on table below will show a necessary correction of .400". This would mean a new, higher front sight (with an overall height of .410" plus .040" for a corrected height of .450") such as a Marble No. 45N, should be installed.
Sighting in should be done with a benchrest or prone with a sand bag or other rest for the rifle. Do not put rifle barrel or forearm directly on solid surface, but put the back of your hand or wrist on the rest and hold forearm of the rifle securely in your hand with approximately the same tightness of grip you would use when shooting at running game. If the forearm or barrel is rested directly on the sand bag or rest, the rifle will shoot higher than when held firmly while shooting at game as more "muzzle flip" will occur.
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