Example:
6creed at 3100 fps G1 BC of .536 and 2500 DA would be 4 mil elevation hold of about 725yds
Plug in 725 yds, 90 degree wind and find the closest to a .95 mil wind hold. Close to 8mph.
That is then calibrated for the 4th mil on the vertical and the second wind dot on the horizontal.
Cut that in half = 4mph and you have a solution of approximately 4mph for every wind dot.
If you go somewhere with significantly higher elevation or density altitude, you need to calibrate again.