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First, at the subsonic speed, a BC based on a sphere was the most accurate (lowest error). G1 was second. Then I think it was G8. And G7 was dead last.
The G1 BC would change if I used 800-1000 fps vs if I used 950-1000 fps. I don't remember the exact velocity range that came out to 0.720, but it was probably 1000 fps down to the velocity that would typically occur at 300 meters.
Whatever the velocity range was, it was what I decided at the time was most typical.
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R&D for AAC
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