ATRAG PDA vs Applied Ballistics Software trouble

[ultrarunner7]

Gents. Ive spent 99% of my time using the ATRAG software on the HP PDA and Im used to it and its reliable. I also downloaded the Bryan Litz Applied Ballistics App for my Droid and really like the options I have (using G7 BC instead of G1 BC, etc). Now, the range tables that Im getting when comparing them are pretty different. For example, at 800m, Im getting about .4 Mils difference. Explanations?

FYI: Ive checked all variables that I know to check... Im going to go shoot them tomorrow and see which one wins but I thought Id lead turn it. Grassy ass

 

[SOC308]

so what is the real world data? I use the horus ATRAG PDA and its been spot on for me. I've used many of the different cell phone based apps and my phone will end up dead in the field.

 

[ultrarunner7]

The ATRAG is spot on man. Ive used it in SOTIC and the real world and love it. The Applied Ballistics app has the rep for being "spot on" as well. Im very familiar with Apps sucking as my spotter decided to download the KA Bullet Flight and I missed everything with it. I then looked back wondering wtf was going on and jumped up his ass once I realized he was using that shitty app. My ATRAG PDA(HP) has taken quite the beating and battery life is pretty bad now. To the point to where I typically take a small solar charger for it. I dont see it lasting too much longer so Im transitioning to the AB app. Just trying to work the kinks out and wasnt sure if someone had similar experience with going from one to the other. Thanks mate.

 

[SOC308]

I've had success with a few of the cell phone apps, but we shoot in remote places and battery life on the phones isn't that great unless you go into plane mode. That said, I've switched from apple devices to android devices, to blackberry, and now back to apple for work.... some of the apps are not and have not been interchangeable. I know this isn't really what you wanted to know, but something i figured i'd throw out there since switching to a dedicated unit has made my results more consistent.

it could be the way the algorithms calculate. Have you checked in atrag that you have added known zeros to specific temperature and muzzle velocities, etc...

 

[ultrarunner7]

I specifically bought a Droid that has a really good battery life and is water proof so that I could use it for this... and it is very good. My next step was to dive into how the algorithms are worked to get the results we observe. Ive read all of the Litz books and assume they are similar. Ill shoot them tomorrow both tomorrow and see what happens. Thanks bud.

 

[shovelstrokeed]

My old Grandfather once told me, "If you have one watch, you always know what time it is, if you have 2 or more, you're never sure."
Seems to apply to all the ballistic computers out there. Pick one, read the manual, read it again and learn how to use it. Most of them are sound.