I have retired my 12ga Ultra Slug, and "downgraded" to a Tracker II 12ga which is much lighter and just as accurate for my hunting ranges. I am typically shootin Lightfields in the white box, which can be got for around $8 per box. I also liked the Litefield Lites, but the supply went scarce, and I switched to "regular strength". I got a Lyman slug mold, but haven't gotten set up yet to reload those.
In the past, though, with the Ultra Slug, I have had excellent luck with the Winchester Partition Golds, longest shot, 125yds ridge to ridge shot in timber. Closest shot 10yds.