I'd think about the Chuck H's phrase "partial backbore" (operative word "partial"), JD. Or selectively honed?
I doubt that, as one poster suggests, the constrictions are identical. In addition, I guess the barrels are original 28" if you say so but that cylinder and 9 points sure sounds like what's left of quarter and half choke when they get their nozzles cropped.
But what do I know? I've had many troubles in my life and most of them never happened--except in my head. And Wise Man say: You don't smoke the herring, it won't turn red.
jack
