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with hunting in mind you know I think if more thought equipment buys through many would just opt for either a mill dot system or a ballistic reticle that they learn to use at closer distance -once...

use these for other than Android software

Ballistic: The Pro Ballistic Trajectory Computer for the iPhone, iPod Touch, and iPad

http://i-ballistics.com/featured/kac-bullet-flight-3-1-0/

Litz is God in ballistics currently,great guy also.
Buy his program and you will not be let down

http://appliedballisticsllc.com/AB_app.htm

JBM is an excellent program and easy to use if you feed it correctly ie - velocity -projectile BC , USE g7 although that wont matter g1 or g7 at distances under 600 yards to much -scope height - use...