FMJ yaw and upset performance

[Tony Williams]

We did some similar calculations on the old 65grendel forum. With the superior BC of a 123gr 6.5 Grendel load, it's easy to exceed 7.62 M80 energy @ 1000 meters. The trouble is that at the closer distances (<500 meters) where most infantry combat occurs, 6.5 Grendel doesn't come close to matching 7.62 M80 retained energy.

No argument with that Stan, but it really doesn't have to - at closer ranges it merely has to show a substantial improvement over the close-range calibre (the 5.56mm) in barrier penetration and terminal effectiveness, which should be no problem!