From the time Parker Bros. stopped using "Decarbonized Steel" all of the barrel steels they used were composite, meaning Plain Twist, Stub Twist, Twist, Laminated Steel, the various grades of Damascus Steel, Bernard Steel and the first fluid-pressed steel Parker Bros used was Vulcan Steel on the VH guns I believe in the late 1880's.
I don't remember which was cheapest of the composite steels but it was certainly one of the 'Twist' steels.
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