To tell what year the barrels were made, just look up the serial number that is on the side of the locking lug. If by chance you have a serial number that predates the advent of Vulcan steel, then you are looking at some different scenario, like a barrel that has had components replaced. Such as the lug or rib. IE: replacing the top rib on a set of twist barrels with a Vulcan rib. Or if the barrels have been mono blocked, who knows what might have been done.
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B. Dudley
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