Shawn Did you talk to Tom this week and write this for us ?????Ha Ha we went up to 6000ft to do some practice last weekend and had the updraft effect our 800yd shots 2.5 moa less then our charts called out. We had about a 7mile per hour wind coming straight up the canyon at us and we were shooting 20 degrees downhill. I had no idea up draft would effect our moa that mutch it seems to be about the same as windage ,,,anyway Thanks Good Hunting,,,John Powers:eek: