Non-Toxic Duck/Goose loads

Haven't shot a front loader in over 30 years and didn't expect things to be much different 'til I remembered the no lead for waterfowl regs. I 've got a Pedersoli 10ga SxS with *****-in chokes: I'm assuming it can handle steel (just because the ***** in chokes date it as a fairly recently built gun, but I'm not sure, since I bought it used from a buddy who never used it
So what I'm wondering is what sort of loads to work up. I've got a bunch of old Rem. SP10 wads, and some BP multi-metal cups, 7 lbs. of Bismuth #4s, 4 or 5 ounces of hevi-shot #4s a friend gave me, and about the same amount of Bismuth BBs (salved from some dunked and soaked 10ga shells)

I'm hoping to work up lead loads in #4 at the patterning board that will be a good shooting facsimile for the pricey bismuth. Don't guess I can do that for the Hevi-Shot.........any input anybody can give me to short-cut the process and get me started would be great.........Thanks

BlackDuckDog