Posted by Drew Hause on October 2, 2025, 1:00 pm, in reply to "Re: USA-F barrel mark"
Glen: the stylized PM (Proof Mark) and HACo (Hunter Arms Co.) in a square over NP (Nitro Proof) first appeared on the barrel flats about 1922
A Research Letter should confirm if the 2nd barrels were originally ordered
https://lcsca.clubexpress.com/content.aspx?page_id=22&club_id=43784&module_id=245742
Dr. Jim recorded 108 2 barrel set Field grades
46
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