Fox, as a rule, only over-bored barrels on the HE grade, the Super Fox, AFAIK. They will run in the range of .738" - .742", typically. As far as being honed out upon return to Fox/Parker/ Ithaca, etc., how could you know factory work from work done thirty/forty years later by a competent gunsmith? Only factory documentation/letter accompanying the gun would enlighten concerning that. Understanding the choke profiles, as bored by the original manufacturer, is also a way to help determine factory barrel boring from aftermarket so.
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