What do you want for it? 
I would take $150 + shipping for it.What do you want for it?![]()
When unusual and or a 'Collector's Item', Smooth Bore Revolvers/Pistols can be deemed a 'Curio or Relic' by the B of A T F and now also E, and, sometimes one needs to petition them for a judgement for that.
Barrel on it's own, is not an issue, far as I know.
Is it possible the Barrel in question was pulled form Production, prior to being Rifled? ( Rather than that it was per se slated to be a Smooth Bore? )
ralph7: Since no one seems to want the smoothbore Python bbl at $150, I asked my gunsmith what he would take. He said, "sell it as a paperweight and see if you can get $50 for it."What do you want for it?![]()