Old-Win wrote on Nov 1
st, 2012 at 12:34pm:
Imagine that you're spotting and your partner just shot an X at 1000 yds. Wind has been steady at 5mph from 10 o'clock and then you get a shift to 10mph at 2 o'clock. Now what are you going to tell him to do on his next shot? You give him the corrections and he looks up at you and says, "huh".
Bob
Well, Bob ,
Here's my call: If we're shooting our usual .45's: Go 9 points rt, and down a short 2. If we're shooting the .38's: Go 7 rt and down a short 2.
I'd also be scanning the mirage, the grass, and the dust to make sure that the target and intermediate wind is the same as the shooters wind. If the mirage is running the opposite way, I'd cut the call in half and hope we stayed on the target so I can make a better call the next shot. If the mirage is boiling, I'd hold for a few seconds until it runs one way or the other. If the boil persists, I'd cut the windage call in half and not go down the 2, as the head wind at the target will slow the bullet and drop it down at least as much as the spin lift kites it up.
Added an addendum: The mirage call will also depend on how bright the day is. If I'm in a boil on a bright day, might have to drop a point or 2 for the target image being raised up higher. It will be blurring and bouncing anyway, so hard to really judge the sighting error.
Point being, it's hard to discern all the factors, and one may negate the other. If you don't observe and note them all, your experience may be the opposite of what the physics predict, and you may not easily learn from the observation.
dave