Depending on the caliber you were running your drift from 0 was about 16”. Difference from 300-400yds was likely about 8” with a 20mph wind. I typically don’t mis-range something by 100yards where the difference in wind drift is greater than the size of the animals vitals. For many calibers the difference in drop is almost 2x as much as wind drift at 20mph between 300 and 400.
Target - 100 lb Pronghorn
Primary Target Size - 8"
Rifle Accuracy - Approximately 4" Group at 400 yards.
Wind - 90-120 degrees (shifting), gusting from 15-25 mph.
Rest - Side of an Arroyo
Complicating factors - Ground vegetation and wind born dust.
Margin for error (Adjusted for rifle accuracy) - 2.0".
You may be better at it than me but under those conditions I was not sure I could shoot 4" 400 yard groups and call the wind drift within 2". That is what would be required for a certain shot.I don't believe I would take that shot today (even though I nailed it).