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  2. Rifleman's rule - Wikipedia

    en.wikipedia.org/wiki/Rifleman's_rule

    This means that the rifle sight setting for any range from 0 to 500 meters is available. The sight adjustment procedure can be followed step-by-step. 1. Determine the slant range to the target. Assume that a range finder is available that determines that the target is exactly 300 meters distance. 2. Determine the elevation angle of the target.

  3. Bore axis - Wikipedia

    en.wikipedia.org/wiki/Bore_axis

    On the other hand, a firearm with a short bore-to-sight distance will need less sight adjustment when changing between targets at close ranges. At longer ranges the bore-to-sight distance will be of less importance, since gravity has affected the projectile so much that the height difference between the bore axis and the sight axis has far less ...

  4. Target angle - Wikipedia

    en.wikipedia.org/wiki/Target_angle

    Angle on the bow is measured over an arc of 180° clockwise from the bow if viewing the starboard side of the target, or counterclockwise from the bow if viewing the port side of the target. Target angles from 0° to 180° are reported as "starboard [ target angle ]", while target angles from 180° to 360° are reported as "port [360° - target ...

  5. Sighting in - Wikipedia

    en.wikipedia.org/wiki/Sighting_in

    In ranged weapons such as firearms and artillery pieces, the act of sighting in or sight-in is a preparatory or corrective calibration of the sights with the goal of having the projectile (e.g. bullet or shell) placed on a predictable impact position in relation to the sight picture.

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  7. Diopter sight - Wikipedia

    en.wikipedia.org/wiki/Diopter_sight

    The parallax distance of a diopter sight is effectively adjusted to be the same as the sight distance. For example, with a distance of 1 m (1.1 yd) between the front and rear sight, the sighting system is effectively parallax adjusted to a distance of 1 m (1.1 yd) in front of the rear sight.

  8. Stadiametric rangefinding - Wikipedia

    en.wikipedia.org/wiki/Stadiametric_rangefinding

    Soldier observed at 400 m: The stadiametric rangefinder in the bottom-left corner of the PSO-1 telescopic sight reticle can be used to determine the distance from a 1.70-meter (5 ft 7 in) tall person or object from 200 m (bracket number 2 to the right) to 1,000 m (bracket number 10 to the left).

  9. Shot grouping - Wikipedia

    en.wikipedia.org/wiki/Shot_grouping

    [1] [2] On the other hand, the grouping displacement (the distance between the calculated group center and the intended point of aim) is a measure of accuracy. Tightness of shot groupings are calculated by measuring the maximum distance between any two bullet holes on the target (center-to-center) in length measurements such as millimeters or ...

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