I was assigned to attend Tom Roster's Steel Shot Instructor's school a couple years before the nation wide ban of 1991. Some Federal Refuges phased in the ban before 1991. Early steel loads were junk compared to what is available today. I suggest to the OP - take your shotgun and chokes, along with a couple boxes of different brands and shot sizes to the range. Experiment !! Different chokes and loads at the ranges you think you will be shooting at. Aim and fire at the center a 30" circle on paper or cardboard. Examine your patterns. My two favorite waterfowl guns like Kent 3" 1 1/4 oz. #1 out of an improved cylinder choke. I have used that load for over 15 years for all my duck and goose hunting. Most waterfowl hunters I have instructed are over choked. For crows over decoys, I shoot Kent 2 3/4" #6 out of an Improved Cylinder choke. For pheasants over dogs, Kent 3" 1 1/4 #2 out of a, yup, Improved Cylinder choke. I have spent many days experimenting with chokes and loads. I built my own portable patterning board with a roll/dispenser of flooring paper. My hunting buddies are as fussy as I am about loads and chokes. None of us use the same ammo, but all of us tested and shoot the loads that work best in our particular shotguns.