Yesterday, I had my rifle out for practice. There was a variable, but mostly 12 o'clock head wind that went from 4 to 10 mph. I put my stuff in Strelock and bam made a first round hit on a 24 inch steel circle at 1135 yards. I was stoked and then shot the next 20 rounds with only one more hit. The head wind was mostly in my face. I didn't realize how much a fish tailing headwind can fool you. Later I plugged in the variation. According to Strelock a difference of -15 to +15 is huge 35 inches at 1000. So it is even more at 1135. The vertical isn't enough for a miss, but horizontal is for sure.