[Angel Cruz Ortiz]

My go to load for upland hunting consist of a Cheddite hull with Cheddite 209 primer, 18.5 grains of IMR SR 7625, pushing 7/8 oz. of lead shot in a SG16 wad. I use 7-1/2 and 8 size shot.
I would like to substitute the lead shot with bismuth for duck season. I would be using # 7 shot.
Is this safe to do?? Do I need to change the amount of powder? Does bismuth load the same as lead? Do I need a buffer to load bismuth? Looking for advice.. I can probably get a book from Ballistic products but I figure this is way more fun.
16 ga... 2-1/2 inch shells