Winchester or Lyman Peep Sights
Winchester or Lyman Peep Sights
When using a graduated peep rear sight of the Winchester or Lyman pattern, the front sight should be held on the bull's-eye in the same manner as described above, the difference being that the front sight only is seen, the eye being held as nearly as possible to the center of the hole in the rear sight. These peep rear sights are customarily fastened to the tang of the rifle, or to its receiver; and. as most of the V notched rear sights stand so high from the rifle barrel as to interfere with a clear view through the hole in the peep sight, it is recommended that they be removed whenever a peep rear sight is put on the rifle, and replaced with a blank piece especially made for this purpose.
A variation in the position of the grouping of shots upon the target, due to a difference in the manner of holding the sights, is often found to exist among shooters. This is sometimes caused by imperfect vision: astigmatism, far-sightedness, or near-sightedness. Astigmatism, or defective eyesight due to a spoonshaped form of the lens of the eye, and which causes lines in certain directions to be seen more clearly than in others, will distort the appearance of the sights in various ways, dependent on the character of the defect, thus producing an incorrect holding, both with respect to lateral alignment and elevation. Far-sightedness will cause a blurring of the rear sight, while near-sightedness will affect the accurate drawing of the front sight upon the bull's-eye. It, therefore, sometimes becomes necessary to alter the alignment of the sights to accommodate the rifle to the shooter's own manner of sighting. When this is done, it should be remembered, as a general rule, that, however the adjustment of the rear sight may be changed, the effect will be to cause the rifle to shoot in the direction towards which the rear sight has been moved, while any alteration of the front sight produces an opposite effect. For example, if the rear sight is moved towards the right, the rifle will shoot further to the right on the target; if the front sight is moved towards the right, the rifle will shoot to the left; if the front sight is filed off, or a lower one put in its place, it will cause the rifle to shoot higher, and so on. This rule for adjusting sights must not be confounded with the manner of drawing the front sight in the rear sight notch when aiming, for in that case the higher the tip of the front sight is held, the higher will be the grouping of the shots on the target. When shooting in a bright light, the grouping will be lower than on a dark or cloudy day. It will be found advantageous, when using an ivory bead or other light colored front sight, to smoke the tin with a match, when shooting on a bright object. When firing either from a prone or kneeling position, a rifle shoots higher than when shooting from a standing position. To alter the elevation of the sporting rear sight, the slide on the front of the horn can be raised or lowered by easing the adjusting screw.
The graduated scale on the leaf of the Winchester peep rear sights is laid off in decimal parts of an inch, having no reference whatever to the range, and can, therefore, be used as a range-sight only after the rifle has been targeted at the various standard ranges and the reading of the scale noted or marked on the leaf. The vernier on the mid-range vernier peep sight, enables this sight to be adjusted to the one-hundredth part of an inch.
All front sights, rear sights, or blanks fitting into a dovetailed cut in the barrel, should be driven into place from the right-hand side of the barrel, and driven out, If necessary, from the left. Much force, or a heavy blow, should never be resorted to, as the sight would not only be mutilated, but the barrel dented or thrown out of line so as to seriously affect its shooting. If it is found that the sight drives in too tightly, its base may be sufficiently reduced by careful manipulation with a fine file. The slot in the barrel should, however, never be enlarged. If the sight is so loose as to render it apt to be jarred out of place, a piece of thin tissue paper may be inserted under its base before driving it in, or the dovetail on its base may be slightly dented near its center, thus throwing up a burr which will hold the sight in place.
Farrow, Edward S. American Small Arms; a Veritable Encyclopedia of Knowledge for Sportsmen and Military Men. New York: Bradford, 1904. Print.
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