5.7x28 FN Herstal...not 5.56.holy crap. I'm glad I reload mine. The .223 45 grain red tips are cheap and I can get a buttload of loads out of a pound on Trublue.
5.7x28 FN Herstal...not 5.56.
Sorry, you are correct.They both use a .224 projectile, IIRC.