I read the short version and learned/realized something new about mils.
However it focused mostly on converting target in inches to distance in yards.
I will continue to the deeper article.
As I use metrics, I use this way to calculate distance to target:
Target is known to be 25cm tall.
Measure the target in mils (2 mils)
Now lets divide the target height with the mils:
25cm/2mil=12.5
And then multiply it by only 10 to get meters
12.5 -> 125.
125m