I think I may have a similar gun and scoped is probably the way to go. I use Brenneke's in all of my smooth bore guns for deer. You can get decent groups out to 75 maybe 100 yards. Thats what I recommend if that is gun you are bound and determined to use.
FYI - If its the same model that I have then make sure where a thick coat when sighting in because that thing will kick the ever living crap out of you.