New to this thread and don't mean to hi-jack, but could someone please explain what a G1 is, and what a G7 is, and what the designation means? Thanks!
G1 and G7 refer to standard projectiles used in ballistics research. If you use any exterior ballistics calculator or program, the Ballistic Coefficient numbers you enter are assumed to be G1 unless labeled as something else. Berger bullets publishes both G1 and G7 BC numbers that you don't want to swap when working with an exterior ballistics calculator. The argument going on is about how best to measure BC values and which gives better results. In practice, it makes no difference to most people.
