Why not "shoot in a boil"

308pirate

Gunny Sergeant
Apr 25, 2017
5,436
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#2
A boil typically means the wind is coming from straight ahead or behind on its way to switching from one side to the other.

It is very rare when the wind comes exactly from straight ahead or straight behind (which is what a mirage boil means). When you see a boil, 99.9% of the time the wind is switching sides.
 

Kopfjager1

Sergeant of the Hide
Feb 12, 2017
454
48
28
#3
Agreed. Another reason, as the wind shifts to a boil as it appears through observing mirage, because your side focus might be set for the target or a certain yardline, you're only going to see it boiling at that specific distance, shift your focus further or closer, you'll see that there is a slight direction change.

I'd rather shoot in gusting high winds than fishtailing winds. Shooting at a grand with 0.3 mRad left for an observed right to left mirage in a headwind then immediately changes to 0.3 mRad right, you're most likely going to miss the target. You can shoot in boils, it's all about timing. It's just not recommended.
 

AIAW

General Asshattery
Aug 16, 2001
3,461
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Central Texas
#4
@m1a convert Probably doesn't belong in the "Stupid Questions" forum either. That's actually a good question/answer that many do not know.

That's assuming that people knew how to read mirage to begin with though.
 

ShtrRdy

Gunny Sergeant
Sep 17, 2011
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High Plains
#5
I was thinking a "boil" would change the perceived vertical location of the target. The aiming point would appear higher and therefore your impact would end up lower.
 
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308pirate

Gunny Sergeant
Apr 25, 2017
5,436
3,257
113
#6
I was thinking a "boil" would change the perceived vertical location of the target. The aiming point would appear higher and therefore your impact would end up lower.
That's possible but it depends on magnification power and the intensity of the mirage (temp differential between ground and air)

Getting caught in a wind shift is the big problem. Unless you are very fast and very lucky, you will get burned.
 

FatBoy

Chris Hayes, Nashville TN
Jul 29, 2001
1,007
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Nashville, Tennessee
#8
If wind is down in TN in the summer you have no choice but to shoot in a boil. Thankfully, that's rare but not rare enough. It's been my experience that when I shoot in a boil my shots impact low. How low depends on distance and the verticle speed the mirage is running.

I 100% agree there is generally a small horizontal component to this as well. It's rare to see the target image float straight up, usually its dancing a little as well. You can usually pick up the trend if you pay close attention to the top of a flat edge (assuming you have one to look at) as even in a boil you can see the heat bend left or right. If your target is too small to be able to shoot through minute fishtailing or a POA dancing you'll have to wait. I dont have the patience for that shit. I SWAG a hold and let her fly...
 
Apr 21, 2007
4,718
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in yooperland
#9
If wind is down in TN in the summer you have no choice but to shoot in a boil. Thankfully, that's rare but not rare enough. It's been my experience that when I shoot in a boil my shots impact low. How low depends on distance and the verticle speed the mirage is running.

I 100% agree there is generally a small horizontal component to this as well. It's rare to see the target image float straight up, usually its dancing a little as well. You can usually pick up the trend if you pay close attention to the top of a flat edge (assuming you have one to look at) as even in a boil you can see the heat bend left or right. If your target is too small to be able to shoot through minute fishtailing or a POA dancing you'll have to wait. I dont have the patience for that shit. I SWAG a hold and let her fly...
In zero wind, watching a boil is like watching a mushroom cloud. Vertical mirage then takes that view and stretches it and about doubles it. As you said, it starts dancing around then. Like mother nature waving the target like a cape in front of you, O`le! mr. bullshooter! And you're like "go away, you little #$%@er!"
 
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