I'm just an average shooter with an average rifle and after testing ammo, can usually find a lot code that I can rely on. I consider myself very good at reading the wind and it's condition and can correctly adjust for most wind conditions. My problem is lack of wind or what my flags are saying is dead calm. My rifle is well tuned (stopped muzzle) and with a light breeze has no problem grouping in the high .1s to low .2s, with normal average wind conditions at a match I can agg. 2100-2200 ARA, poor switching conditions or gusty winds will pull my aggs. down to 2000 or worse. What I want to know is why in what appears to be a dead calm I can barely agg. in the 1900s with bullets seemingly going anywhere other than the dot? Some people liken it to how a knuckle ball flies. Now I'm not talking way out, but it seems like I will get a dozen line cutters on a target (high, low, left, right) that I feel should be an excellent target other than 1 or 2 ammo inconsistence's. I've been told lot's of theories, from thermals to mirage but I can't grasp any of them when one shot will hit low left for a 50 and the very next shot might hit at 3 Oclock for a 50 and the shot after that may hit high left or right. Especially when these matches are won by aggs above 2300. So what do you guys say? First off, has anyone else had this problem? Did you find a solution? Does anyone have ammo they specifically use in the calm? Have you found certain bbls, rifling style, or twist rates that work better in the calm? This drove me crazy last season and even stopped me from competing at a range that held matches in the evening calm, so any advise would be appreciated.