6xc 115 dtac.... 8 mph gun?

[Rade1MOA]

Alright so I'm trying out the wind theory that was discussed on the podcast. My BC according to Tubb is a .620 at 3011 fps average. I'm comfortable with that BC and my data is tracking perfectly and has been verified to 1033 yds. So in theory I should have a 6 mph gun+-. However, when putting the info into a few different ballistic apps it take 8 mph to make the wind holds line up.
100 is .1 and tracks to 900 yds
1000 is 1.1 so there is the plus .1 that was discussed
1300 is 1.5 so I'll need plus .2
1400 is 1.6 "
1500 is 1.8 so I'll need plus .3

Big question does this seem right to you guys? Why do I need an 8 mph wind with a bc of .620. Are the DTACS that good at flying?

 

[morganlamprecht]

In Ballistic AE it’s a 6mph gun

6mph starts out slightly less than .1 per 100 for 800 yds but rounds up

It’s .9 @ 900 and 1 @ 1000

This is at 0 DA

It’s a 8mph gun @ 8000 DA

What DA are you at? That changes things

 

[Rade1MOA]

Is there any kind of ratio for shifting the mph value of the gun based on the DA?

 

[PinesAndProjectiles]

Is there any kind of ratio for shifting the mph value of the gun based on the DA?

I dont know off the top of my head, but you can run different scenarios in your solver and try to determine what it would be.

 

[brianf]

i spend some time on DA looking for a way to accurately create constants for it.
doesnt work out.
percentage of previous
percentage of original
standard deviations
all that crap
you can get close if you run the numbers like suggested.
but there were enough differences that i needed the same amount of info i would need if i just wrote it down to begin with.
hope someone chimes in, and i was just screwing it up.

 

[mahlv]

my 6x47 is the same, im at around 8000-9000 DA. 8mph in shooter as well as AB on my kestrel. The 115dtac is pretty amazeballs, but would be nice if they would stay more consistent lot to lot