if you have a smart phone download shooter for $10 bucks...if your rifle and ammo is all put in correctly...turn on the advanced features and true it up in the field it will be VERY accurate and you can use it right where your shooting instead of using drops that were made up 2 hours or 2 days prior to your shoot...i also have ballistics AE which is a PITA to set up and use and has a bunch of(to me)useless features.
heres the set up instructions for shooter...
http://www.shooterapp.net/phpmanual.
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