I haven’t shot F class yet. I just got a Swarovski BTX 85 and used it fir the first time shooting paper at 300 yards. I had a really hard time seeing the bullet holes in the black bull, though another person was able to see them with difficulty using my spotting scope. In F class, are competitors observing poi at 600 yards and 1000 yards and adjusting their wind call from shot to shot? If so, how?