The strenghtened frames was something that was discussed but was never acted upon to my knowledge.At the time everyone was freaking out over steel shot damaging their guns.Going to a #2 frame was talked about but was too expensive to implement.As to the bore diameter,the guns were specified at .740.My #26 gun which is the prototype steel shot has a .740"bore diameter and is choked .006" and .018".Variations from that would have to be factory deviations.Remember,these guns were ordered kind of on the fly.Parker Repro was bringing out a 12 and the steel shot law went into effect.We were working fast to get out a usable double gun for steel.I ordered the guns to match my gun.I did not have time to measure and check each gun as they came in.It is possible that as they learned more about steel shot the factory reduced the choke as they learned that less choke constriction was needed with steel.I have seen guns choked like mine and those with more open chokes.The same with bore diameters.
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Threaded Mode