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Old 01-30-2017, 09:55 PM   #5
justmecurtis
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Join Date: Jan 2017
Posts: 4
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Within Chairgun pro app there is a BC calculator. If you know the velocity and the drop at a given yardage it will calculate BC.

Chairgun pro is a free app on Itunes

I would also recomend a paid app called StrelokPro. By far the best ballistic app I have tried it also has a BC calulator.
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