FMJ yaw and upset performance

[stanc]

To match the long-range (up to 1,000m) performance of the 7.62 M80, in terms of retained energy and other metrics, with a smaller and less powerful cartridge requires a bullet with a better ballistic coefficient than the M80's. The 123 grain Lapua Scenar seems to do that job very well in the Grendel, so it's a matter of getting close to the BC of the Lapua with a mass-produced FMJ military bullet.

According to Lapua's numbers, the 108, 123 and 139 grain Scenars, and the 144 grain FMJBT, have BCs in approx the same proportion to their weight. If the same length is retained for a 123 grain FMJBT, it should have a BC close to that of the 123 Scenar: 0.527