10-21-2011, 08:15 PM
I have a 16" tactical upper from AA. I believe the barrel was made by sabre defense, too. It has the same issues as yours and has been back to AA twice. Hornady ammo is very tight in the chamber....sometimes requiring "mortaring" the rifle to extract an unfired round from the chamber. AA performed some chamber work to get it working better. It is still tight, but functional. When firing, it doesn't have any problems ejecting the hornady ammo. I don't like the tight fitting hornady cases, but I may have to live with it this way.