Flatter trajectory and considerably faster.
I'm not convinced that is a practical advantage in 100yd or less tactical situations. Shooting from a bench with a scope, yes. Or farther out.
I believe it is an AK platform chambered for the lighter round. Can someone confirm that?
It’s just as good as the 5.56 if not better (especially at longer ranges).
Friend of mine can hit a refrigerator sized target at 700 yards with it using iron-sights. I’ve never tried that though.
The rounds are smaller. 53 grains to 70 grains.