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Don Fischer's picture
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Doping the wind

A guy stopped by yesterday that used to shoot long range match in the military and we got to talking about it.

We were talking about estimating the wind out to 1000yds. I told him of a guy I read that claims to be able to estimate the wind to 500yds and be withing 1 mph of correct. Well he said that's probally not true and even if it was, 1 mph isn't enough to make much difference. I asked about using grass to estimate it as that sounds like so much BS to me. And appearently it is. Sometime watch the grass, different stems blow in different dirrections and heavier grass doesn't bend as much. Forgot, he said to focus half way to the target for the reading.

Then he told me he could guess wind fairly close but only on fairly warm days. Your gonna love it. He uses high power binoculars or better a spotting scope and reads the heat waves! Yeep, that's what he said. That annoying garbage moves around with the wind. It'll tell you left to right and suggest velocity. Seem's that wind coming from say, 1:30, 4:30, 7:30 and 9:30, the effect is lower side deflection. That makes sence to me.

C.G., Rick, you guy's shoot long range. How accurate is this? Makes perfect sence to me but I'm in grade school.

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Location: Misouri
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Doping the wind

Yes, reading mirage can be very accurate. I was taught to take several readings, add together and divide by number used.

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Doping the wind

I have only used wind socks/flags to judge so I am a bad one to ask but it seems to make sense that it would be effective after you got used to it. Think

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Doping the wind

Why not get one of these little gizzmos. I seen them on one site for $38.00

http://www.go2marine.com/product.do?no=10222F

Don Fischer's picture
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Doping the wind
Hammer1 wrote:
Why not get one of these little gizzmos. I seen them on one site for $38.00

http://www.go2marine.com/product.do?no=10222F

A wind speed meter. I hear of guys that use them a lot but, it only works where your standing. Trying to figure it out down range.

Remington:
Yes, reading mirage can be very accurate. I was taught to take several readings, add together and divide by number used.

Take several and devide by the number of takes? I don't suppose you know how much of a wind change is going to mess things up? I'm pretty sure that 1mph won't make a great difference, but 5mph?

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Location: Misouri
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Doping the wind

I need to be a little more clearer on this as I re-read my post and it sounds confusing.

Take several wind readings by DIFFERENT wind reading methods and divide by that number. This is right out of USMC Scout Sniper Manual, NRA Precision Rifle Instructor Manual and H&K Precision Rifle Instructor Manual. Been to two of the three.

5mph? Hmmm, Range lets say 300 yards, Wind? we'll say Full Value Left to Right.

Range 300yds (3) x Wind Velocity 5mph = 15 divided by the constant number 15 (for a 308 168FGMM) = 1MOA

Hold 1 MOA left or Adjust (1/4 Min @ 100 yd scope) 1 Min left.

If this was a half value wind in same direction divide answer by 2.

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Doping the wind

By half value do you mean wind that is not coming directly from the side of the bullet? Instead say, 7:30 or 10:30 to the bullet's path?

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Doping the wind

Don, that is correct.

No Value Wind = Coming directly in front of in back of you
Full Value Wind = Left to right or right to left (make a + sign thru a clock face)
1/2 Value Wind = Left to right or right to left (make and X thru a clock face)

Some shooters even take it to the extream of 1/4 value wind. I don't use it but what ever floats your boat. Hope this helps. Best of luck to all.

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Doping the wind

Yes it does, thank you very very much. I would imagine 1/4 wond would be hard to read?

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Doping the wind

Anytime, I'm sure most here will agree that reading wind is an art form in it's self. It can be damned frustrating at times.

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Doping the wind

Range 300yds (3) x Wind Velocity 5mph = 15 divided by the constant number 15 (for a 308 168FGMM) = 1MOA

Remington,

In this sentence you mention "constant number". Where do I find this number? My guess is it is based on the B.C. of the bullet your using? Is there a formular for figuring this out?

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