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Note added at 7 мин (2018-08-26 11:59:38 GMT)
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Zeroing is the adjusting of the elevation and windage on the service rifle to cause the ... The ability to analyze a shot group and apply zeroing fundamentals is an ...

Zeroing your rifle. By Tim Davies of Premier Shooting Experiences. Holding her steady. The fundamental to zeroing, is to be stable. This often means using a ...

Zeroing a rifle is a vital step on the road to accurate shooting – but, as Mike Morton explains, so is knowing where to aim at a host of different ...

https://www.google.ru/search?newwindow=1&biw=1067&bih=750&tb...

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Note added at 8 мин (2018-08-26 12:00:45 GMT)
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Sighting in or zeroing a firearm is the goal of adjusting the sights so the projectile (e.g. bullet or shell) may be placed at a predictable position within the sight picture. The principle is to shift the line of aim so it intersects the parabolic projectile trajectory at a designated point, known as a zero, so the gun will repeatably hit where it aims at the distance of that zero. The iterative procedure involves firing a group of bullets from a cool barrel, adjusting the sights to move the point of impact to the point of aim, and repeating the process until a group is centered on the point of aim.
https://en.wikipedia.org/wiki/Sighting_in