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Old November 28, 2012, 01:16 PM   #11
mete
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Join Date: June 14, 2004
Location: NY State
Posts: 5,479
About 1970 started the use of cold hammer forged barrels and almost all are made that way now.
In theory anyway the barrels should get stress relieve heat treat at various stages in manufacture .Stressed barrels like to return to earlier bends when they heat up from firing !
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