I have never been able to make this work while hunting
The game won't let me check the wind and flag it. At the range this is fine, and works good if you make the shot and read the results. If conditions are not steady, you can spend the day chasing the bulls eye with your scope by adjusting every shot.
If a person cannot master reading the wind, he should limit the range to something that he can manage. NEVER take a shot that you don't think you can make. There are enough things that can effect even a confident shot without adding lack of skill to it. I always figured that it was the animals day if I turn down an iffy shot and wait for my day when conditions are within my abilities. Targets are forgiving, hunts are not.
Just my opinion
J E CUSTOM
Well thats a pretty safe position to take, and certainly not one which many could disagree with.
But the fact is that where distance is involved when shooting, the type of terrain can also make a world of difference regarding wind.
When hunting in steep mountainous terrain, shooting across wide valleys with perhaps a large stream below, and onto a hillside having large deep hollows which can create their own conditions, there are no experts. There will always be BSrs, but no true experts.
On top of that the hills are covered with large trees, mostly hardwood having large canopies of various size branches.
The ground will be covered with the leaves that only recently fell, covering the ones from last year and the years before that. Provided of coarse there is no snow covering everything.
So there will be no dust as has been mentioned, nor will there be any grass/weeds or small brush for the most part. Maybe a patch of mountain laurel here or there.
Of coarse there are always the tree top branches to observe which might say one thing here and something else over there and down there.
And speaking of branches, which never get mentioned in these type debates, what is the trajectory or "your" gun at say 900 yds?
Any chance that could also be an issue?
So as has been said, "in summation" we cant really address this subject as a one size fits all situations, or even all people as for opinions.
Hunting by its very nature isn't always pretty, regardless as to which way you go about it and how good you've gotten at doing it.
And if that creates a problem, then best stick with shooting at targets.