I've got one.... It seems to be extremely well supported. Also, I've measured the diameter of the chamber to be about .427 at the max which I believe to be right in line with the other fully supported barrels I've used or seen (LW, etc). PM me or post here and I can take any other measurements you'd like.
FWIW, I've never seen anything even close to resembling a smile or bulge. I've went up to the following (with new Winchester brass and CCI300 primers).
200gr XTP over 9.5gr 800X
200gr WFNGC over 9.7gr 800X
200gr XTP over 8.2gr LS (will work up more)
135gr Nosler over 13.0gr 800X
and many others
Using a 20 and 22lb recoil spring, as well.
Let me know if you need any other measurements...