I agree that they seem to perform better at lower velocities.
I suspect that the 65 gn .224 Game Kings would show a lot less penetration and a lot more 'blow up' if they were launched out of a 22/250 or 220 Swift for example and the target was close.
So far the my results with them on deer from a standard .223 have been very good. At this stage I'd rate them better than the 63 gn Sierra (and I've shot a lot of deer with that bullet)
