I would like to share a little more about shooting on that day
. This may or may not work with you, YMMV!
I shot with both eyes open. Right eye to aim, and left eye to keep an eye on (Matt's) wind indicators. Wind direction was changing so rapidly that it could change between sighting and pulling the trigger. I think this helped me change my POA a few times just in time.
It was actually easier to correct for strictly cross wind compared to tail wind! Given the same cross wind intensity, the pellets drift pretty much by the same amount. In the strongest cross wind, I had to put the POA one full circle from the bull's eye.
Tail wind did not always drop the POI. I think the drop of POI was not proportional to the intensity of tail wind. There was an "optimal" tail wind intensity that dropped the POI more than lesser or strong tail wind. Don't know how to quite quantify that, yet.
Wind indicators are very helpful! I'll make some for the next competition. According to Chairgun, tail/head wind should not have much effect on the POI at 25 meters, not nearly as much as cross wind. However, quoting Matt, down/up draft was significant at least at this shooting range. That probably explains quite a few misses in the FT matches!
Hope someone finds this useful for the next match.