to add to Rob's post.... we have gunsmith customers that will order a barrel blank for they're customer. That gunsmith can or does keep notes on work he has done for that customer before.... and he doesn't need the customers action in hand after the initial fitting. He can thread, chamber, set headspace etc... and all works like it should.That is definitely not what I am talking about. I am talking about quality barrel blank being turned into a prefit. And all the prefits I have used which has been over a dozen in multiple calibers have been one offs. I order it and they make it. Not a budget barrel off the shelf. I never thought of them as that.