counter sniper guide by Unknown

Author:Unknown
Format: epub

The text on this page is estimated to be only 7.58% accurate move the head about, so that the eye moves in the area of the exit pupil. There should be no movement of the reticle on the target, as you aye moving only your eye and not the rifle* If there is movement, the telescope is not properly adjusted for parallax* In scopes with adjustable front lenses, the parallax can be corrected by following the manufacturers instructions. In almost ail cases, defective hunting type telescopes should be sent back to the factory or at least returned to the maker's local representative for parallax adjustment. Parallax can be demonstrated in a simple way at your desk* Use a photo that has some sort of suitable target on it. Place the tip of an ordinary pencil on the target with the pencil in a normal writing position* Move your he-ad about; there will be no movement of the pencil point on the photo. Now raise the tip of the pencil a couple of inches off of the photo with the hand still resting on the desk top. Now move the head and notice the relative movement of the pencil point on the photo. This is comparable to the error in the telescope, when not properly adjusted for parallax which means simply that the reticle and picture are on different focal planes. What does all this add up to? It simply means that if your eye is looking into the right side of the eyepiece you shoot on one side of the target and with your eye on the left you shoot on the other side. The center of impact is changed by the position of the eye when using a telescope with parallax error, but it is not influenced by eye movement on a correctly adjusted telescope, 4. Inasmuch as the countersniper normally becomes involved in actions in other than favorable light conditions, there are several areas of concern in relation to the type of telescope sight that is required by the counters niper. a. The magnification of the telescope influences the amount of light that can be seen in order to identify a target. The low power scopes have a bright image- the high powered scopes, a dim one. The six power telescope is recommended as the happy medium for the ,222 caliber* Its light gathering qualities are very similar to the so called "Night Glass,11 the 7 x 50 bioncular, which has proven itself for use under unfavorable light conditions world wide* We are referring to the hunting type of sight with internal adjustments for windage and elevation, which will remain at a constant range setting and utilize the trajectory curve of the cartridge, by using a simple hold over or under technique within the 300 yards usable range* For the 30 caliber longer range rifles, a target- type telescope of ten power is recommended, which must have precise micrometer adjustments to obtain exact zero at these greater ranges.

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