Thanks for the help everyone! Now I'll wait for my research letter. Is there any chance of getting an early word about the chambers before I receive my letter?
Meanwhile, does anyone else happen to have end of chamber/forcing cone wall thickness measurements for a Parker 12 gauge?
I'm leaning towards the idea this is a non-Parker modification that was done a long time ago as evidenced by consistent rust staining through the full length of the chamber. Also, the fact my chambers are 3" exactly, not following the factory practice of being 1/8" short.
Drew, by the way my forcing cones are 1/2".
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