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  2. Minute and second of arc - Wikipedia

    en.wikipedia.org/wiki/Minute_and_second_of_arc

    The subtension is linear with the distance, for example, at 500 yards, 1 MOA subtends 5.235 inches, and at 1000 yards 1 MOA subtends 10.47 inches. Since many modern telescopic sights are adjustable in half ( ⁠ 1 / 2 ⁠ ), quarter ( ⁠ 1 / 4 ⁠ ) or eighth ( ⁠ 1 / 8 ⁠ ) MOA increments, also known as clicks , zeroing and adjustments are ...

  3. Shot grouping - Wikipedia

    en.wikipedia.org/wiki/Shot_grouping

    Two shot groupings obtained with different firearms at different distances. The group on the left measures about 13 mm and was fired at about 45 meters, which equals ⁠ 13 mm / 45 m ⁠ = 0.29 mils (1 ⁄ 2 in group at 50 yards, approx. 1.047′× ⁠ 50 / 100 ⁠ = 0.524′).

  4. List of second moments of area - Wikipedia

    en.wikipedia.org/wiki/List_of_second_moments_of_area

    Regular polygons; Description Figure Second moment of area Comment A filled regular (equiliteral) triangle with a side length of a = = [6] The result is valid for both a horizontal and a vertical axis through the centroid, and therefore is also valid for an axis with arbitrary direction that passes through the origin.

  5. Sniper rifle - Wikipedia

    en.wikipedia.org/wiki/Sniper_rifle

    For comparison, a competition target or benchrest rifle may be capable of accuracy up to 0.15–0.3 MOA (0.04–0.09 mrad). A 1 MOA (0.28 mrad) average extreme spread (the center-to-center distance between the two most distant bullet holes) for a 5-shot group translates into a 69% probability that the bullet's point of impact will be in a ...

  6. M24 sniper weapon system - Wikipedia

    en.wikipedia.org/wiki/M24_Sniper_Weapon_System

    300 yards (274 m): 1.9 inches The radial distance from the calculated center of impact of the first target compared to the calculated center of impacts of the subsequent targets shall be less or equal to 1.086 MOA (3.3 inches @ 300 yards, 2.2 inches @ 200 yards, 2.4 inches @ 200 meters) on an average basis.

  7. Mad minute - Wikipedia

    en.wikipedia.org/wiki/Mad_minute

    The first Mad Minute record was set by Sergeant Major Jesse Wallingford in 1908, scoring 36 hits on a 48-inch target at 300 yards (4.5 mils / 15.3 moa). [ 1 ] Another world record of 38 hits, all within the 24 inch target at 300 yards (2.25 mils / 7.6 moa), is said to have been set in about 1914 by a Sergt.-Instructor Snoxall. [ 2 ] '

  8. Cord (unit) - Wikipedia

    en.wikipedia.org/wiki/Cord_(unit)

    A cord of wood. The cord is a unit of measure of dry volume used to measure firewood and pulpwood in the United States and Canada.. A cord is the amount of wood that, when "racked and well stowed" (arranged so pieces are aligned, parallel, touching, and compact), occupies a volume of 128 cubic feet (3.62 m 3). [1]

  9. Chain (unit) - Wikipedia

    en.wikipedia.org/wiki/Chain_(unit)

    Respectively, these square divisions of land are approximately 80 chains (one mile or 1.6 km), 40 chains (half a mile or 800 m), and 20 chains (a quarter mile or 400 m) on a side. The chain is still used in agriculture: measuring wheels with a circumference of 0.1 chain (diameter ≈ 2.1 ft or 64 cm) are still readily available in Canada and ...