The exact center of the rear aper-ture sight should be indicated by a line that is twice as long as the lines for left and right windage. This is known as “Zero elevation” and “Zero windage”. The rear aperture sight windage needs to be put at exact center, also rear aperture sight needs to be put at its lowest elevation, or Zero elevation. The first step in doping your rifle will concern the rear aperture sight. Until further notice and for brevity, when the phrase “rear aperture sight” is used, it refers specifically to a, “rear peephole sight.” We will discuss other types of rear aperture sights later in the article. The 6 O’Clock hold can only work with iron sights in this configuration. Competition sights move in increments of 1/4 inch at 100 yards per sin-gle unit of movement, commonly referred to as a “click”, because the single movement can be felt and heard. Your sights should be set-up with a front post centered at the end of the muzzle and an adjustable rear sight for elevation and windage with a rear “peephole” or aperture sight. The NRA, NSSP and CMP (unless specifically noted otherwise) matches are all conducted with iron sights.
Any rifle that you are using for competitive shooting needs a thoroughly kept DOPE Book. If not, get busy and get it done you’re behind the curve! The DOPE Books are absolutely critical. Knowing that each of you have started a Data/DOPE Books on your SPR’s.
Some shooters use other types of target engagement, but for NSSP it is for match and match practice only. The reason for using this method of aiming on a target with the inner rings blacked-out is simply it is easier to find the lowest part of a circle than it is to find the exact center of a circle, also it is a match only method of aiming, nearly exclusively. In fact, your point of aim will be lower than the point of impact. The first thing the shooter needs to understand is that the 6 O’clock Hold is not a “point of aim, point of impact ” method of sighting. THE REAR SIGHT MUST AN ADJUSTABLE “PEEPHOLE” APER-TURE IN 1/4” AT 100 YARDS FOR ELEVATION AND WINDAGE MOVEMENT.
T O USE THE 6 O’CLOCK HOLD AND OBTAIN THE BEST RESULTS POSSIBLE, YOU MUST HAVE A FRONT AND CENTERED POST ON THE END OF THE BARREL.
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