I'm just thinking...
Back when I had just the one AR-15, I put a nice (expensive) JP barrel on it, and then wound up "abusing" it in a 2-day rifle class. I'd have been fine with any factory carbine.
Did the same thing with my only bolt-gun. Nice Lilja barrel, great long-range performance until I cooked it, shooting too much, too fast.
So that's where I'm coming from.
Mike