http://www.federalpremium.com/ballistics_calculator/ (http://www.federalpremium.com/ballistics_calculator/)
you want to look at 5.56 and 7.62 and ^:)^ ^:)^
with dist out 2000++ yards at 5 yard break down on 5.56 and more ..:..
Shooter is another good ballistics calculator that you can put on your phone and print out hard copies for back up . You can true your data too.
http://www.shooterapp.net/
I use STRELOK on my droid.
Does it all including up/down hill, windage you name it.
And it's free.
2cl
I use the app Ballistic AE powered by JBM on my ipad. I will run some comps later to see how it compares. Thanks for finding this!
For teaching new shooters I usually recommend the Winchester app -- it's simple and colorful... seems to be effective: http://ballisticscalculator.winchester.com/ (http://ballisticscalculator.winchester.com/)
For my own evil purposes I generally use the Hornady one instead: http://www.hornady.com/ballistics-resource/ballistics-calculator (http://www.hornady.com/ballistics-resource/ballistics-calculator)
I'll check out the Federal app too...