Wind Reading
Also: Wind Call
The skill of judging wind speed, direction, and value to convert it into an accurate horizontal correction, the hardest part of long-range shooting.
Wind reading is the process of estimating how fast the air is moving, which way it is flowing, and how much of that flow actually pushes the bullet sideways, then turning all of that into a horizontal correction. Shooters gather those clues from many sources at once, including grass and trees near the firing line, downrange flags, and the boiling mirage seen through a spotting scope. Because the wind between the muzzle and the target rarely blows at one speed or from one direction, a single number is always an educated estimate.
Once a value is chosen, the shooter applies it through the wind hold versus wind dial decision and accounts for the smaller, more predictable effect of spin-drift. Reading the wind well separates competent long-range shooters from the rest, since elevation can be solved with a good ballistic solver while wind must be judged in real time. The discipline demands practice, careful note-taking, and a steady understanding of how the wind value changes as the bullet flies downrange.