It's eye-opening. At one point in the day, the flag at the two mile target was not moving. At 2900, it was strong right to left. The flag at 2600 was gently left to right. The flag at 1400 said the wind was blowing hard left to right. Elevation difference between flags was around 150 meters.
The 2 mile stage was with squads taking turns. Each squad had a different wind condition. I heard one shooter saying "daai wind is voodoo".
I saw a lot of shooters making the same mistake when calling impacts that appear in the spotting scope to be just below the target, but behind it. "Net onder deur". No, it not net onder deur, it's over the top, because at ELR range the bullet is falling like a potato from the sky, and half a mil too high drops it a few meters behind the target going just over the top.
Glass quality is most important, rather better glass and less magnification.
With my scope, I had to use holdover on the 2900, my magnification was just under 10x so I could use the whole reticle. I hit that plate on the practice day before, but not on the match day.
I was spotting using a Celestron 20x binocular with 80mm lenses. Good lenses, not the best glass money can buy, but easy to see the impact marks on the 2900 plate, and little puffs of dust where the bullets dropped near the target at two mile.