All I can say is make sure the smith you pick is comfortable working with the carbon fibre barrels. I was about to use one on a build and in research I found things like this below. Also one of the biggest gun builders in the states wouldn't offer there accuracy guarantee if I chose a proof barrel. Now that doesn't mean they are a bad barrel or that your gun won't shoot. Lots out there that do but I wouldn't use just anybody to put that together with the cost of those barrels.
An example of my research.
Possibly Bad:
- They are a nightmare to fixture in the Lathe. Be careful sending these things to just anyone with a lathe.
- They can have VERY badly wandering bores. The last one I did, with the chamber end dialed in concentric with a long reach direct indicator (within 0.0002 yada yada), the muzzle end was running out about 0.150". That is probably the worst Ive ever seen a barrel, even compared to a Savage pencil #### hunting barrel. This is not necessarily going to be a bad thing, unless the smith doesnt deal with it correctly.
1. If he does not dial in the chamber end, and just sticks it in a collet, your bullet could be leaving the chamber into the bore at a relatively extreme angle. May or may not be an issue, I wouldnt want to risk $900 to find out though.
2. If he does dial in the chamber end, but does not time the muzzle to 12:00. With that last barrel, if I had not timed it to 12:00 you would probably use up about 5 mils of windage getting your 100yd zero, thus also extremely limiting your total elevation adjustment.