Why is there a discrepancy between Bc’s from AB and Hornady? I shoot the the 143 ELD-X and Hornady has the G7 listed at .315. Conversely, AB has it in their library at .292! Can someone chime in on this?
Published BC numbers are just a starting point to use to verify your dope if you're using a ballistics app that only uses BC. AB using an average BC they gather from doppler. I can't speak for exactly what Hornady does
Using AB curves rather than a bc # seems to work real well most of the time for me. I imagine one could use 4DOF similarly? The published #'s I really only use for bench racing ballistics than actual firing solutions.