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Old 11-04-2007, 11:45 AM   #14
dstorm1911
Curio & Relic
 
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AKaholic #: 4307
Join Date: Aug 2005
Location: Mostly Tucson, AZ
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If there were cosmoline or other gunk in the chamber when initially headspaced it could have compressed allowing a perfect fit for the "GO" gauge,

If the top of the barrel/journal were galled enough it will allow the barrel to be pressed up enough in the journal to allow it to "ramp" the pin creating your headspace problem, now this is the wierd part because usually the headspacegets tighter UNLESS your using a AK 74 style muzzle brake which actually pulls forward on the barrel when fireing.......

An over sized pin journal will cause the same effect instead of actually removing the barrel try resettting the headspace so it will barelly close on a go gauge then drill out to a larger barrel pin diameter this will avoid disturbing the set the barrel has already made in the journal...
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