The idea is simple and is usually found in simple grid pattern targets. What I wanted is a target that I could set at 100M and another corrected for 100Y that would directly correspond to the 1/10 MIl clicks on my scope. You will most likely need a good spotting scope to see the actual numbers but if you print a reference copy you should be able to make pretty good approximations with a 10x scope as long as you can see your bullet holes. This target is also great for box testing within 1 Mrad as well as just checking a cold bore zero at the beginning of a range day.
For people just starting out, this is how you use it:
Set the 100Y target at 100 Yards or the 100M target at 100 Meters
If this is your fist time zeroing, bore or laser sight till you're on the paper
If you've warmed up your barrel getting on paper or otherwise then aim for the center bold square
Read the elevation correction to the left and the windage correction to the right
Example above: If your shot falls high and right you should correct 8 clicks down and 6 clicks left.
I am fond of the metric/milrad system and it's powers of 10, it also appeals to my commie liberal bleeding heart ;) Here are the PDFs for US letter paper
You may need to right/Control click and "download linked file"
http://www.evingrant.com/pics/MilZero100M.pdf
http://www.evingrant.com/pics/MilZero100Y.pdf
