I have the 11-87 with a rifled/cantilever barrel. When I first got this shotgun I sighted in with Lightfields, then a few years ago I was going out to Illinois and wanted a much lighter slug and went with the Winchester Suprems Golds (385gr) with decent results, but I just went back to Lightfields EXPs (blue shell) 2-3/4". Sight in to be 2.5" high at 50 yards, turn your scope up to the highest level when you sight in.
Best of luck