I'm working on a drop chart for a new 300 RUM shooting 210 bergers at 2750ish fps. It was shooting 4" high at 800 yards and shooting over the 1000 yard target. So I adjusted the velocity calculation to lower impact and now it is right on at 800 yards but a good foot high at 1000 yards. There is usually a wind coming directly at you at the range so you are shooting into the wind. Can this head wind be lifting my bullets at the last couple hundred yards of the range?