I was just using 18 inches to check the scope and reticle.There should be 10 dots in 18 inches at 50 yards at 9x, but at 9x there are only 8.5 dots in 18 inches.
These are Leapers UTG customer service reasons why their 3-9x40 AO Mil-dot and their 3-9x32 AO Mil-dot scopes DO NOT have dots that are 1.00 mil apart.UTG scopes have Mil-dots that are about 1.00 mil apart at 10x only.UTG Mil-dots will never be 1.00 mills apart on a scope that only goes to 9x.Their variable scopes that do have 10x will be close to 1.00 mil between dots at 10x but still will not be exact because it is difficult to determine exactly where 10x is located on the power ring. 10x may actually be 9.5x or 10.5x.Scopes that are the same model will have close to the same distance between Mil-dots but different models will have different distances between Mil-dots.According to my measurements:My 3-9x40 AO Mil-dot scope has 1.18 mils between dots at maximum power=about 9x.MY 3-9x32 AO Mil-dot scope has 1.24 mils between dots at maximum power=about 9x.