Thanks doug,
  The rifled choke  will be the hard part to find, i've never seen a combi with one...  I think that would be a rare combi bbl set.
  When i tried slugs in my combi, they shot pretty good.  Don't ask me how good is "pretty good" as it was so long ago i no longer remember.  I just remember feeling i could use it as an back up shot if needed.
  Have you seen any 412's around forsale?  If so, how much are they selling for these days???  I haven't seen one around here at all.
  Drilling Man