There’s no real answer. A barrel is as a barrel does. I could start talking about how prefits are not as good as semi custom rifles with gunsmith fitting, and there’s someone that’s on here that will have had a different experience. Range of fire aside.
So, really, the answer is it depends. If you’re looking to simply swap out a barrel, check head space, load and shoot...will it be accurate? It might. It might not. You’ll know when you try. As far as for a mile...well you’ll have to see at close/r range how it does now, won’t you. At a mile, everything starts becoming an issue. One might be quick to blame a barrel and come to find out there’s really bad ES and shitty fundamentals.