I have come across a Fox/Utica 16 28" barrels, all is original including some light rust on the barrels. Otherwise with all the Philly characteristics. Chambers are 2 1/2", possibly 2 9/16. I was surprised at that. I think I have had Philly 16s with longer chambers, but not sure they were original to the gun. When were Utica guns produced with (2 3/4") longer chanmbers? Thank you. Gil

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