Yep partly cloudy skies blew one of my chances at a clean at 600 there. I was paying attention to it and kept having a few elevation issues throw me into the nine ring suddenly.
I had 14 x count that day though IIRC and 1 10 ring and 5 in the nine at 6 o'clock. I didn't have a clue why until I finished and the high master scoring me told me why. Got to love it!
