Matt and 98Z5V gave a detailed course on long distance shooting, including range estimation and reading wind, using only your optics to tell you how to adjust your shot. This was at the Fall Shoot in AZ. There were no flags posted in the desert to tell us which way the wind was blowing.
The biggest thing you have to know is how your scope works.
@Matt.Cross, I did order the PA 4-14 with MOA reticle.