Steel Hardness
Looking at witness marks has brought to mind a question which I hope the Lugersmiths, refinishers, and other machinists here can answer.
Judging by the difference in the "flow" of steel at the edges of witness marks, it appears that the barrel steel of WWII guns may be softer than the steel of the receivers to which they are mated. The nearly identical-appearing edges of the witness marks of Imperial-era Lugers implies that the barrel/receiver steel hardness of these guns is much closer to being the same.
Is this borne out by experience? Does anyone happen to have documetary evidence concerning the steel hardness of different Luger parts?
--Dwight
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