You do understand that these numbers are predicted numbers based on bullet dimensions only? The same bullet will have a different BC when shot from different barrels based on many variables. The only true way to establish the correct BC for each rifle / bullet combination is to shoot it at transonic - around 1300 fps and measure it there. Any range less will be skewed data. My 7RUM / 190 Matrix combo BC is .720 when the AB prediction is around .680. I am fixing to test the 168 ABLR in a 7SAUM and the 150 ABLR in a 7-08 Ackley and it will be interesting to see what the actual BC's are. Even the Berger 140 VLD in the Ackley is higher than predicted around .530 compared to AB prediction of .510.
The AB numbers are not predictions. Bryan actually live-fires the bullets and measures drag by using Doppler radar. His experimental method uses the latest technologies and srutinizingly objective processes. So I'm curious what method you're using to measure G7 BC that you think is more accurate than Bryan's method? Are you using a chrono to measure MV, and then deducing BC via drop?
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