Cary is on target. I believe it was Miller who put it into those terms: http://www.doublegunshop.com/forums/ubbt...=true#Post74072

There have been several discussions along these lines. A search will turn up more. http://www.doublegunshop.com/forums/ubbt...e=0&fpart=1

It would be great if a metallurgist ever did an analysis of some of these barrels. Or perhaps that has already been done?

Pete