Phil.. I'm not aware of any really good shooter that does this. Its just more crap to deal with and it's not necessary. If the wind is at your back, hold a lower gun hold. If the wind is in your face, hold a higher gun hold. It's just that simple. No messing with different shells..... Just my opinion.. Dan Thome (Trap2)
Wind in your face would slow the birds and cause them to rise
Wind from behind would tend to speed them up and drive them down. But I don't think the difference is speed is enough warrant a change in shell speed.
The holding points are a different matter. Higher hold for wind in your face and lower hold points for wind in your back.
Just remember you guys... A wind at your back makes for a convex target path/arc, and a wind at your face has a concave path/arc. Lotta targets missed under when the wind is in your face and over with a a following wind. But shell speed has nothing to do with compensating for the arc change.
A very good friend of the forum shoots all his targets by "covering them". I keep trying to lower my POI. He is an ATA All-American (et-al). Drinkin bud of mine, he is.
If the wind is coming from behind you, you obviously need faster shells to make up for the additional speed of the target ... If the wind is coming at you slower shells will work just fine if you let the wind carry the target back to you ... On the angles, just close your eyes and pray unless its running with the wind and or against it, then refer to above and shoot faster ... These helpful shooting hints will be included in my new book called "Shooting in the wind, Deal with it" ... WPT ... (YAC) ...