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Old 02-06-2018, 05:42 PM
cplnorton cplnorton is offline
Join Date: Nov 2011
Location: Van Wert, Ohio
Posts: 2,011

This is from the study the Marines conducting in 1938. They were trying to reheat treat receivers of both the high and low numbers at the Dupont Manufacturing company. Notice the Marines call the high number receivers "overs" and the low number receivers "unders."

Basically in the end of all these studies, they seem to just stop trying to fix the problems with the M1903 receivers and just enlarge the gas hole in the bolt and drill the hatcher hole in the receiver. And just not worry about it. lol

But according to this report, just because it's a high number doesn't mean it's safe.

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