Originally Posted by Psylocide

You can throw slugs through a smooth bore as long as your choke is big enough, I think IC or Cylinder are fine. I recommend going to a pawn shop if you really want to get cheap.

Grab a couple of boxes of different slugs and see which perform best.

However, this combo will not have the effective range of a rifle by a long shot. Not sure "power and reliabilty" are any less in a rifle either, but if that's your take, so be it.