Originally Posted by Airgator0470 Some bullet makers offer BC's based off velocity. Yes, they shoot through two chronographs,one at the muzzle and one downrange. Crunch the numbers then spit out an average. I've read somewhere that the only true way to get accurate bc numbers is by doppler radar.
Last edited by seadog; December 27th, 2014 at 06:00 PM.
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