With a flame temperature of 3200 deg F...I don't think anyone should be surprised what they see on the inside of the chimney. That said, I would like to see, on 3 new bbls, the difference between a well made hammer forged, a cut, and a button. From the standpoint of a machinist, I would suspect the button would look horrible...since after all is said and done, you are smearing steel. But look how well button bbls shoot. There's a lot we don't know.
