The Winchester AA and Remington STS and Nitro 27 can use basically the same wad and load. The Winchester universal has a paper basewad that can come loose after reloading that would then probably lodge in your barrel. After that your shotgun bulges or worse comes apart. The same applies to all the value shells you would get at say Walmart. Of you are looking for hulls theres a place called pap charlies that usually has them. Been awhile sense I've done them. The Lyman shotshell manual has tons of good info and cutaway drawings in it. It's a good one to have on hand.

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