Harder to slug?
One of my sons had a Remington (SP Police maybe?) .308. Didn't keep it long, but somewhere I still have two groups he fired with it at 200 yards that I'd be very happy with from 100.
Still, I'm convinced there's a lot of ways to make good barrels, and has been that way for a very long time. Give an old quality rifle some good modern bullets and they can surprise you.
