kipsbay,
Welcome to Graybeards! You didn't mention whether you bought a 12 ga or 20 ga? The rifling twist is 1-28 in the 20 ga and 1-35 in the 12 ga. Knowing the guage will help us to give better recommendations. I have a 20 that likes the Remington Ultra Core-Lokt & Copper Solids, Winchester Partition Golds & Platinum Tips, Federal/Barnes. Hornady SST's shoot like crap in warm weather, but shoot good in colder weather (under 40 degrees F) and perform excellent on game.
My gun (or maybe it's just me) has never liked the Lightfields, they hit about 6-9 inches low at 100 in my gun. The only thing nice about them IMO is the lighter recoil. Never used those on game, so cannot give a thumbs up or down on those.
The slugs I would avoid are the hour glass shaped (BRI design) made by Winchester & Federal. While they shoot excellent on paper, the on game performance leaves a lot to be desired IMO.