The rifle is a Ruger 10-22 (custom built match gun) with a Simmons 6.5 x 20 x 50 MM (MidwayUSA $125) mil dot reticle scope. At 14X the crosshair is a 50 yard ZERO, 1 dot above the cross hair is a 25 yard Zero, 1 dot below the cross hair is a 75 yard zero, and 2 dots below is a 100 yard zero.

My target was a 11 meter air rifle target with 11 bullseyes on it. The range distances were measured, ammo was CCI HP MiniMags.

I tried other scope magnifications; 10X, 12X, 15X, and 20X; but had significant deviation from a "zero setting" . The 25 and 50 yard groups were one-hole 5/16" centered where the X-ring used to be. The 75 yard group was 1/2" centered in the black. At a 100 yards all the shots were in the black bullseye.

I have two M41 S&W target pistols with red dot sights, a CMore and UltraDot. At 75 and 100 yards, bullet drop is about 4" and 10"+ . Because of Dot size vs. Bullseye diameter, group sizes opened up to 3" and 5". My conclusion was that you can't shoot a small group if your dot is bigger than the target.

This is not an apples to apples comparison, but I believe it helps understand the difference between dot sights and scopes.

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S&WHF 366