Brian, I agree that stated BC's for bullets may not be correct. Sierra and Berger both measure time of flight between two points as well as start and end velocities at each one. That's the most accurate way for calculating BC's. I don't know what Hornady and other bullet company's folks use. And a given bullet will have different BC's in different velocity bands; I don't quite understand how Berger's G7 BC single numbers could be accurate. Sierra lists up to 6 BC's for their bullets across a wide range of velocities.
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