Phil...
The strawing instructions are indeed Howard's (PL), but the reason they stopped strawing and started bluing in 1937 was not metalurgy but strictly to expedite manufacturing... all parts went to the same hot salt blue process because of the pressures of war time.
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regards, -John S
"...We hold these truths to be self-evident that ALL men are created EQUAL and are endowed by their Creator with certain UNALIENABLE rights, and among these are life, LIBERTY, and the pursuit of happiness..."
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