Quick update. Well, ammo cost and availability being what it is, I bought a $22 set of flip-up sights on ebay to try out. Dropped them on my AR without any adjustments and the 150 gr ammo hit straight on but 4-8" inches high at 50 yards. I didn't spend the time to make adjustments to the front sight. I'll do than when I have more ammo available. I'm just happy to convince myself the new barrel shoots straight and isn't throwing flyers all over the place. Definitely a scope mounting issue.