I'm assuming you mean using a rifled slug barrel for shot. I wouldn't suggest it. The rifled barrels don't have choke and the rifling will spin the wad and shot when it comes out. From what I understand it will leave a hole in the pattern. I don't think you will have very much luck using one for hunting birds or bunnies. Might work for close up defense type stuff though.
The only way to really know is to go out and try it to see how it patterns. My guess is you won't be impressed with the results

. If worst comes to worst youn can pick up a H&R or NEF single shot for under 100 bucks new, even less used.
Paul