Vortex Optics VIPER HS LR 6-24X50 RIFLESCOPE — First Focal Plane - Manual (Page 6)

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Windage a nd Moving Targets
The XLR reticle is highly effective when used for wind and moving
target leads. Using the reticle for effective windage and moving target
leads will require thorough knowledge of your cartridge’s ballistic
performance under varying conditions as well as experience in reading
wind strengths and target speeds. As in bullet drops, it is important
for the shooter to learn a particular weapon’s windage/moving target
corrections in MOAs rather than inches. Always hold the reticle into
the wind.
Basic windage correction on center crosshair
When dialing elevation come ups, the center horizontal crosshair will
be used for windage or moving lead corrections. MOA marks on the
horizontal crosshair are graduated in 1 MOA increments out to 24
MOAs, and at 1/2 MOA increments beyond that.
3 MOA reticle windage correction for 400 yard shot in 10 mph crosswind
using center crosshair. Elevation adjustment already dialed into riflescope.
10 mph wind
Full value wind at 90 degrees
Example