Long distance shooting?

[sgtsandman]

I've been told that shooting early is the best way to eliminate mirage. Outside of dumping some serious cash on a top notch optic. A sun shade is supposed to help some but I think that is more for glare and heat off the barrel than for mirage.

 

[davkenrem]

Not picking on you W.E.G., but this is a common statement.

So, why is this? I mean, there's a lot that goes into accuracy, but why can't a gas gun be as accurate as a bolt gun?

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[Dennis]

Wind at your firing point is not usually the same as the wind downrange.
Folsom range is crazy like that.
The best you can do is read the mirage. But that doesn't tell you what the wind is doing at the height of your trajectory.