After a bit of frustration attempting to use Ballistics AE to examine the impact of a constant wind on a Hornady EDL-M 52 grain bullet I decided to play around with Hornady's app. The impact of even slight winds like 3-5mph at just 100 yards was informative. But I was particularly puzzled by what Hornady have labelled "aerodynamic jump" which affects their "come up" calculation/results. Specifically, the elevation adjustment inverted depending on whether the wind was from 9 o'clock or 3 o'clock. As an example, with the bullet in question, a 5mph wind and muzzle velocity of 3000fps (just picked at random for now) the calculator generates a come up of +/- 0.37" (0.1 mrad) depending on whether the wind is from 9 or 3 o'clock. I'm surprised at the magnitude of the elevation adjustment needed and why it is positive (bullet otherwise strikes low) for a 9 o'clock wind and negative for a 3 o'clock wind. Can someone enlighten me as to the ballistics here?
(It was enlightening to learn that a 3mph 9 o'clock wind would kick this bullet a half inch high right.)
(It was enlightening to learn that a 3mph 9 o'clock wind would kick this bullet a half inch high right.)
That is why, in a R/L wind, shots lost to the left (even in a L-R wind) do not exhibit as much "vertical" (High left) as shots lost to the right (LOW right). All that stated, presuming a R twist - it would reverse in L twist. The degree of precession is also tied to spin (velocity/twist) rate.
RG
