Outlaw
I last summer bought a 12 gauge USH (SB2-980). The scope I used was called the Nikon Slughunter, which has a BDC reticule. The reticule has four lines, one being 50 yards, 100, 150, and 200. Read the directions on how to site in. It is a 250 dollar scope, but it is specifically designed for slug guns. That is what I would get
Hope this helps
buckshoooter