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Old December 15, 2012, 10:06 AM   #9
dahermit
Senior Member
 
Join Date: October 28, 2006
Location: South Central Michigan...near Ohio, Indiana.
Posts: 4,441
It is an artifact left over from the machining processes...a "chip". If the bore, crown, and rifling are all right, now that you removed it, forget it and try your hardest not to let it ruin your life.
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