At the finale for the league I shoot in (NWPRL) the targets out and past 1000 (one stage was 1140, 1180, 1280 if I recall correctly?) were 30" circles. It was blowing over 20 mph and plenty of people went 0 for 12. I think the best score was maybe 6/12 and that was with some of the top shooters in the country present. I'm pretty sure in every match I've shot the targets were full size IPSC once you got to 800 or so. At my long range practice spot, my targets are all around 1.5 moa with my far one (980 yards) a 16" square but it's never particularly windy.