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Ballistic tables - IPhone Apps

3802 Views 7 Replies 4 Participants Last post by  varminter
Has anyone used any of the IPhone apps for ballistic references? I saw some of them listed on the IPhone app store and wondered if anyone has used them, and if any of them were worth having. Thanks!
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Probably the best one for long range shooting is Bryan Litz's point mass solver. The complete rundown is at the end of the link.

Does that program work with G7 BC's, or is it limited to the usual G1 BC's? If the latter, does it allow for multiple BC's with different velocity break points?

The G1 ballistic coefficient curves don't match modern bullet shape drag functions very well, so one way to fix that is to adjust it at different speeds to get a better curve fit. For example, Sierra provides match bullet BC's this way. For example, the BC (G1 is the SAAMI standard) for the 175 grain MatchKing is given as:

.505 @ 2800 fps and above
.496 between 2800 and 1800 fps
.485 @ 1800 fps and below

It was entry of that data I wondered about. If the program accepts G7 BC's, though, I don't really need it. G7 matches most boattail match bullets well enough that one number is good enough.
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