I have a Remington Sporting 28 (1100). I haven’t taken it waterfowl hunting yet. I did take it to South Dakota pheasant hunting a few years ago. Honestly, I did better with it than I did with my 12 gauge. I’m looking at buying some TSS loads for it this year. There’s a guy in Sterling, Michigan that manufactures all kinds of TSS loads, Red Dawn Shotshells.
https://www.reddawnshotshells.com/collections. They’re pricey but what isn’t these days. I looked into buying the components and loading them myself but I think I was only going to save about $0.80 per shot shell. Noah Shaver or Clinton John may be able to weigh in better on the per shell costs.