Bruce,
Thank you as once again you have brought up a subject that is not only interesting but thought provoking and educational. I have to admit I have never given a moment's thought about whether Parker Brothers used the same steel but named differently as a marketing ploy. My uninformed thought would be they used different compositions of steel for each grade of gun. I would think a metallurgist could melt the different steels and come up with differences in composition, possibly more manganese or carbon or whatever else is in barrel steel. I know Winchester made a big deal about using molybdenum in their barrels at one time. Possibly without advertising exactly what was in their steel each was constructed of similar but different ingredients for Parker barrels.
Dennis
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