04-17-2012, 02:12 AM
Yes, an AA bolt should headspace in an AA barrel just fine. After re-reading this, I understand that Colt's original 7.62x39 bolts were the basis for the Beowulf then Grendel bolts, and other manufacturer's 7.62x39 bolts are merely 5.56 bolts opened up with a 5.56 bolt face depth.
