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Shooting at close range indicates a cylinder bore barrel to deliver a wide grouping, while for hunting at longer distances such as 50 yards or meters, a choke is recommended to constrict the scattering for a tighter pattern. [3] In archery, a shot grouping is the result of one person shooting multiple arrows at a target.
Larger diameter groups indicate reduced hit probability on smaller targets at that range and suggest groups with a larger number of shots may provide better estimates of required adjustments. Sighting in is most effective from a stable shooting position allowing the shooter to relax while the firearm is supported on a bench rest or on a sandbag ...
Conversion of various sight adjustment increment Increment, or click (mins of arc) (milli-radians) At 100 ...
Generally, scopes will have turret adjustments to allow the scope to be easily adjusted for various shooting conditions. For benchrest shooting, scopes with a second focal plane (SFP) reticle and click adjustments of 1 ⁄ 8 moa (approximately 0.036 mil) are most commonly used. Scope models with 0.025 mil and 0.05 mil adjustments are also ...
Here is an example of a ballistic table for a .30 calibre Speer 169 grain (11 g) pointed boat tail match bullet, with a BC of 0.480. It assumes sights 1.5 inches (38 mm) above the bore line, and sights adjusted to result in point of aim and point of impact matching 200 yards (183 m) and 300 yards (274 m) respectively.
20 mm / 50 m = 0.4 mrad, or 4 clicks with a 1 / 10 mrad adjustment scope. 50 mm / 1000 m = 0.05 mrad, or 1 click with a 0.05 mrad adjustment scope. In firearm optics, where 0.1 mrad per click is the most common mrad based adjustment value, another common rule of thumb is that an adjustment of 1 / 10 mrad changes ...
For long range shooting it is important to compensate for the wind by observing the wind's strength and direction, and then adjust the sights accordingly by rules of thumb. Wind force can be estimated by feeling the wind at the shooting position and seeing signs of it in the terrain.
For example, a rifle capable of firing a ½ or 0.5 MOA (approximately 0.5 inch center to center of the two holes furthest apart) 5-round group (often referred to as "grouping") at 100 yards will theoretically fire a 12.5 inch group at 2,500 yards (0.5 × 2,500/100 = 12.5). Unless the group is centered perfectly on the target at 100 yards, the ...