I don't know if RinB is a gunsmith or something but perhaps he has his own experience with barrel contours that doesn't necessarily conform with what factory ideas are about safe thickness's for magnum chambered rounds. All I know from my limited experience is that factories appear to use heavier barrels than perhaps what a gunsmith would do per customer requests. Even that 300 WM Remington Custom Shop African Plains rifle I have has a heavier contour barrel than say their KS rifles in standard, non magnum chamberings, but it is visibly trimmer than the production magnum sporter contours.
