Is there such a thing? I have experienced and witness several high misses at the 500 yard mark across canyons this year and wonder what gives. I have practiced to 600 yards and am (was) extremely confident at that and shorter ranges. The misses involve two different guns and shooters and no more than a 10 degree change in target elevation. Shots that weren't across canyons were spot on. The high misses appeared to be around 8 to 10 inches high but I can't be sure. I have heard of up and down drafts, but how do you allow for them or identify them? or is this even the problem? Your imput and experience is requested.