Applied Ballistics wind error?

[RattlesnakeCreek]

I am having an issue with my AB kestrel and the AB app giving too much wind hold.

I compared the same inputs in 4dof and StrelokPro.

6 creed. 107 SMK. 3120fps
850 yards. 10 mph. 10 o’clock
68F. DA 4312. RH 41% Dof 104

AB. 5.0 elevation 1.3 wind
4dof. 5.0 elevation .8 wind.


When I swing the wind around to 3:00 . 850 yards. Same DOF

AB 4.9 elevation 1.4 wind
4dof. 4.9 elevation 1.1 wind

What am I doing wrong in AB?

 

[sea2summit]

Spin drift set in both?

 

[Dthomas3523]

I get 1.4 with that bullet/speed/DA with StrelokPro at 850 10mph at 3 o’clock

 

[RattlesnakeCreek]

Spin drift set in both?

Turned off both places.

 

[Dthomas3523]

Post pics/screenshots of your settings in any app/software you need an opinion on.

 

[RattlesnakeCreek]

I get 1.4 with that bullet/speed/DA with StrelokPro at 850 10mph at 3 o’clock

The 10:00 wind is the one that appears wrong in AB.
I was comparing 10:00 and 3:00 to see if it was at all angles.

I did a similar comparison with data for my .260 . I’m getting a similar result from that rifle as well.

 

[RattlesnakeCreek]

Turned off both places.

 

[Dthomas3523]

The 10:00 wind is the one that appears wrong in AB.
I was comparing 10:00 and 3:00 to see if it was at all angles.

I did a similar comparison with data for my .260 . I’m getting a similar result from that rifle as well.

I get 1.2 with 10 o’clock in StrelokPro

 

[Dthomas3523]

That gun should be about a 6mph rifle.

10 o’clock wind is about 86% value for a 9mph value.

.85x1.5=1.275 wind

 

[RattlesnakeCreek]

I get 1.2 with 10 o’clock in StrelokPro

 

[Dthomas3523]

That star and orange test in your wind/elevation means you have spin drift and/or coriolis turned on.

 

[Dthomas3523]

Also, -28 deg is 11, not 10 o’clock.

 

[RattlesnakeCreek]

That star and orange test in your wind/elevation means you have spin drift and/or coriolis turned on.

 

[Tokay444]

Think that’s strange? My 4DOF gives me different elevation just switching from imperial to metric inputs. The odd part is, it converts all the values as far as I can tell, so it’s all the same data.

 

[Dthomas3523]

.7 is correct for an 11 o’clock wind.

 

[RattlesnakeCreek]

Well... there is one mistake. Now to figure out why 4dof is different.

 

[Dthomas3523]

I’m not 100% proficient in 4dof, but what I’m seeing, you need the actual elevation and pressure.

When I use the elevation slider, the pressure moves.

Input your actual elevation and actual environmentals.

 

[Long Range 338]

Ballistic apps don't have actual algorithms to properly calculate wind or spin drift. The short version is that they estimate and tend to over estimate. If you go to the threads for the Everyday Sniper Podcast and locate the one that talks about how to calculate wind the podcast explains this is detail. Very lengthy to explain and write out.

 

[Dthomas3523]

Ballistic apps don't have actual algorithms to properly calculate wind or spin drift. The short version is that they estimate and tend to over estimate. If you go to the threads for the Everyday Sniper Podcast and locate the one that talks about how to calculate wind the podcast explains this is detail. Very lengthy to explain and write out.

Yes and no. They calculate things very well with the input they are given. The problem is we cannot input enough data for the entire path of the bullet.

He should be able to get within a tenth or two with software and all his software should be close to one another given the same inputs.

 

[Dthomas3523]

I’m betting if you put in your actual elevation, temp, humidity, and pressure into 4dof, you’ll get a solution close to AB and StrelokPro.

 

[Long Range 338]

Here's a days worth of reading for you on the subject:

https://www.snipershide.com/shootin...r-podcast-70-mike-and-frank-are-back.6891601/

 

[Dthomas3523]

Here's a days worth of reading for you on the subject:

https://www.snipershide.com/shootin...r-podcast-70-mike-and-frank-are-back.6891601/

Let’s not confuse him.

His question is why the software is so far off between the three.

It’s because of his inputs. Not the limitations in the software.