Ah, the .1mil is .36, a full MIL is 3.6in@100 yds, 3.4377 MOA to equal a MIL@100. I was in a hurry when I typed the other response.
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I was going to point that out just to help clarify.
For the OP both units (MOA and MIL) are radians - units of angular measure. They are based on the radius of a circle and it's relationship to the circumference of the circle. Think of one degree of a circle, that's an arc, the radius of the arc is the range to the target, the arc length (the small part of the circumference of the circle that is in that one degree) is the amount change per MOA or MIL. The longer the radius (the range to the target) the bigger the arc length is (the amount of change per MOA or MIL).
100 clicks on a MOA scope with 1/4 MOA adjustments is equal to 100 x .25 = 25 MOA of change.
100 clicks on a MIL scope with .1 Mil adjustments is equal to 100 x 0.1 = 10 MIL of change.
Without a specified range we have no idea how many inches either unit represents but let's assume 100 yards.
At 100 yards, 100 clicks on a 1/4 MOA per click scope would equal 25 MOA (approx. 1" per MOA) of change which is roughly 25 x 1" = 25 inches.
At 100 yards, 100 clicks on a .1 MIL per click scope would equal 10 MIL (approx 3.6" per MIL) of change which is roughly 10 x 3.6" = 36 inches.
At 1000 yards you would still have the same number of MOA and MIL change (25 and 10) but since each radian is now 10 times larger (10 inches per MOA and 36 inches per MIL) you end up with larger total changes.
250 inches for 25 MOA
360 inches for 10 MIL
I will say however that with modern scopes it is all pretty much mute anyways because most will be calibrated to move 25 MOA or 10 MIL for one full rotation of the elevation knob so either scope would require just one rotation up for 100 clicks.
In the real world MIL scopes are usually easier to write the adjustment numbers down because you usually only have a number in the teens as opposed to an MOA value that is usually in the 30s or 40s. For example; a bullet drops 450 inches at 1000 yards, you'd have a come-up of 45 MOA or 12.5 MILs, which is easier to write on a drop card and stick to your stock and read quickly in the field? And turning the knobs to their marked position is much easier when you move them 12.5 major increments rather than 45 major increments. MOA scope would usually require 1 full rotation of the knob plus another 20 major increments while the MIL scope would require 1 full rotation and 2.5 major increments beyond that.
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