Here is a picture of a Rose Wheel, which shows the effects of wind on a bullet from a right hand twist barrel. We really pay attention to the wind when shooting benchrest. A head wind (11 vs. 1 o'clock) can have completely different effects on the bullet. Just like 5 vs. 7 o'clock. The outside arrows represent wind direction, the inside dots are for the effect on bullets from center.
Amen! For many years, I shot a 222rem in BR, and it really taught me a lot about wind.