SMK1000plus
Well-Known Member
I know there was a thread on this not long ago, but I was not able to find it by a search.
Did a little shooting yesterday at 1035y with about a 20mph wind from 9 o'clock. Along with that the shot was across a deep canyon running steep downhill from left to right. So the wind was coming down from left to right. My elevation solution wound up being almost 2 moa more than I was expecting. We have seen variations in bc from one rife to the next with a given bullet, but this one was more. Bullet flight in this shooting location is about 1000' above the ground always making it difficult to read what the wind is doing.
Let me know your thoughts or if anyone knows the previous thread on the subject post the link.
What was your latitude and your target azimuth? Bullet (cal., weight, B.C.)? Velocity? SD? ES? Environmental info (temperature, humidity, direct sun or shade, barometric pressure, etc.)? Powder used and its temp stability?
Some of these individually or all of these variables combined, could easily account for the difference in calculated and actual firing solutions at 1,035 yards. From the terrain you described, just the direction and velocity of the wind at max ordinate could easily account for the difference.