Maker bullets BC

[Klem]

It seems smaller companies aren't able to run their bullets across a doppler system to get BCs and many are calculated based on drop in a relatively small dataset.

mgr,

Labradar uses the Doppler effect to determine velocities. If you have access to one you can determine your bullet's BC.

Here's an example using 32 rounds across the Labradar. Then plugging the average velocities into JBM's BC-by-velocity calculator.

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Note the lower calculated BC's than the single 0.458 the manufacturer claims. This is unsurprising because manufacturers are tempted to list the highest BC their testing gave them, because the higher BC's sell more bullets. I am sure in certain conditions the 120NBT would be 0.458 however at slower velocities like the Grendel it will be lower, and keeps getting lower as the bullet heads downrange.