Yep. The G7 model essentially accounts for the variability of the drag coefficient as part of the model. The G1 model does not. The G7 model also better models the drag profile of a long profile boat-tailed bullet compared to the G1 model.
I'd forgotten that the new Noslers had the G7 listed. I'm curious how they derived them. The BC can be derived by computer modeling or measured. Most bullet makers derive their BCs and they end up inflated, at least slightly. Sierra measures theirs. Berger has measured values for some of theirs as well.
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