I'm using the Williams Universal Slugger sights but they would be considered rifle/iron sights just like the Truglo's. For me, I shoot and sight them in just like I would if they were on a rifle. I want the center of my shotgun pattern's POI to match my POA. Out to 40 yards, I like to place my point of aim between the top of the head and the waddles (basically the middle of the neck). A lot of people aim for the head, but if you put the center of your pattern on his head, then the top half of your pattern is being wasted in my opinion.