Proof Research
As far as their accuracy test: You can't unscrew a barrel and screw it back in and expect the same point of impact, doesn't matter if you beat on it or not. Just be aware of that and I think even a bent barrel would still group.
Their barrels won't save any weight, but the are strong and the wrapping sucks heat out rather than trapping it in. A .338 LM with that barrel has a longer life than any other.
They use a a barrel profile that can fire a round without the carbon fiber and then wrap it to get you the stiffness of a heavier barrel.
Gunsmithing buddy that I have just built a .338 norma mag with that barrel, a titanium extreme action, CADEX stock....its an awesome rifle, but way out of my price range.