Hi Borax
Good posting with pics
The min valUe for BC is to allow you to enter Several valUes of Bc. It changes'slightly with velocityspecially down close to the speed of Sound. You Can enter extra bc Values by touching the green PLus button. You w0nt need to do this for ordinary hunting.
straight below the BC area in the bullet setupis Zero Data.Thats where you enter yourZero range (l00m) and Zero height ( 5cm) if using metric units .
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