Advanced Marksmanship Wind Formula Constants?

[MilDot1960]

Ok thanks for that I will order a new Chronograph on monday, I have just found the Chroney Beta at a store over here, I have all the other things i need I think, But you are right because even the figures you quoted are so close to my rangefinder and incredibly close to the data under ideal conditions its amazing, so if I can find or reproduce these figures in the real world I will have a great starting point,

Now all i need is when I put this all together is away of printing the finished product on to cards, then I wont have to bother with electronics in the field as this will then become second nature again, although I have only had that tablet system going for about 8/9 weeks it has caused me to forget and have doubts in what I always use to put into practice, and untill i got this thing nearly all of my shots were in or close to the bull, but this is a lesson for everyone really on how not to rely on gadgets,

Thanks for the help because I was starting to loose the plot with too many figures and none of them matching and none of it making sence anymore,

John

 

[Boogie]

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[The salmon]

How do you find the constant for what round your using

 

[Lowlight]

How do you find the constant for what round your using

On Page One it was posted

Here is how to get a constant

Code:


range(100's) * wind speed (mph)

Constant = --------------------------------

Wind hold From computer

 

[The salmon]

On Page One it was posted
Here is how to get a constant

Code:


range(100's) * wind speed (mph)

Constant = --------------------------------

Wind hold From computer

So its range x wind

Also i found this wind formula in mils and am wondering it its correct:

Wind speed mph x range divided by constant = wind value in mils

 

[MilDot1960]

Hi everyone, since i posted on this thread I found the problem that other have mentioned about the old wind constants dont always match up when you compare them to Apps, Well I have 3 versions of one particular App, the free version and the + version and then a couple of days ago I bought the Pro version,

When I did the Math I got one number when I used the Plus paid App they did'nt match and since I got the Pro version the figures are now within .01 to .06 moa and the reason, when I Add SD/Spin Drift to the App that did not have SD or CE within the program I then got the correct figures I then used the Pro Version that did have SD and I got numbers that matched the Math numbers, So then I used the NON SD version and added the SD to the figures and they then came Very close to the Constants, either way I messed around with these numbers the constants became more Accurite,

Now as for using the constants for other size bullets if you add the correct SD/CE numbers then the Constants will work.
Crazy but it works,

take care, John

500yds= 1.666667+.375=2.041667moa
600yds= 2.142857+.500=2.642857moa
700yds= 2.692308+.625=3.31738moa
800yds= 3.076923+.775=3.851923moa
900yds= 3.750 +..950=4.700moa
1000yds=4.545455+1.125=5.670455moa

 

[usmc02xx]

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[black500]

tagging for later

 

[MilDot1960]

I know this thread started a couple of months back But I find that some of the numbers dont work out and I have tweaked them to see if they match my ballistic tables for the 7.62/.308 175gr BC.496 at 2800fps with a temp of 59*f

So with 600yds with a 10mph wind, 6x 10=60 devided by 14=4.285 moa yet my software says its -4.8 which @ 600yds is going to put me out by 0.514 moa out which at 600 will be 2.947" out, and at 1000yds 10x10 devided by11 = 9.090909 and my software says it should be 9.5moa so at 1000 im gonna be 4.283" off,

But with the 700 and 800yds being devided by 13 works OK on 700yds but on 800yds 8x10 devided by 13= 6.153 when the software says its 7.0 which puts me out by 7.087" . it works better if I devide it by 12.5 because i then get and moa of 6.4,

can someone tell me why or what is wrong here as now I dont know which to believe in, SEE this is what happens when you go hi tech, I'm not sure if this is a good thing anymore,

Thanks Guys, john

I have Quoted my own post because here I said about @ 600 yds x10mph / 14= 4.285 But when you add the SD/CE of .500moa or (.49 ) = 4.805714 which is close enough to the 4.8 that I quoted above

john