I second the suggestion for Kelbly. I've chambered my own barrels for just about every popular action out there and I've found nothing better than Kelbly's. The Atlas Tactical gives you a fully nitrided action and mechanical ejector for under $1k. If you want an integral rail and lug you'll then get into the $1400 range.
Their tolerances allow for pre-fits although I don't know anyone making them.
<edit> I've heard from folks I trust that Mack Bros. are fantastic but I've got no direct experience.
Their tolerances allow for pre-fits although I don't know anyone making them.
<edit> I've heard from folks I trust that Mack Bros. are fantastic but I've got no direct experience.