I was just curious because my gunsmith has that barrel laying in his shop and I am trying to build a mountain rifle and he is giving me a deal for it. When I looked at the specs the 6" reading was .9 and I thought to myself that is as thick as a bull #5. I know the shank will be eaten up in the receiver. It tapers off to .580 at the muzzle, so it looks like it tapers sharply. I already have my stock and inletted for rem mountain contour but I wanted that barrel which is a steal.