Commonly used in the shooting world as a point of reference, a Minute Of Angle is 1.047 inches at 100 yards. Normal shooter application uses the simplified 1” at 100 yards. For perspective, the difference between using the exact 1.047 and 1” is 0,47” at 1,000 yards. So, if a reticle has a 1 MOA dot, the dot would cover 1” at 100 yards. MOA is also relative to the click adjustments on scopes and iron sights. Scopes with 1/4MOA clicks would require 4 clicks to shift the bullet impact 1MOA (1”) at 100 yards. The same adjustment would move the bullet impact 1MOA at 200 yards, which is 2 inches. A simple way to calculate MOA at ranges less than 100 yards is to use the 100 yard adjustment and doubling the number of clicks for 50 yards and doubling again for 25 yards. For example, if a scope has ½ MOA click adjustments, it will require 2 clicks to move the bullet 1” at 100 yards, 4 clicks to move the impact 1” at 50 yards and 8 clicks to move it 1” at 25 yards.
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