Hopefully someone with real experience at super long ranges can answer this one. I first saw this theory somewhere (can't remember where) a long time ago, and saved this picture. I recently read a post by Shawn Carlock and he mentioned the same phenomenon (9 o'clock wind will drop POI, 3 o'clock raises it). I've not seen any sort of confirmation of this in the Ballistic Software I've got. Neither the new NightForce PC version or the old Sierra Version 2 programs show this happening? If it really does happen, then why? Why does the NF program have ways to adjust for Spin Drift and Coriolis Effect but leave this phenomenon out?? Any answers to this one?? Perhaps Shawn would like to answer since he did some SD studies for NF??