I don't like the danged things. I have some Italian made see through green ones that are better than the more recent red ones, but not much. They stick in my tubes, and the red ones are only good for a load or two max. Any load you can find for a Federal or Cheddite hull will be fine.
Tin Man, the practice you have developed by loading them like the Compression formed AAs will be fine, in fact they will be a little anemic. I load all my Cheddite and Federal hulls the same as I load my Remington and Winchester AAHSs. Less powder by a grain or so can't be too hard on things! Yes, I do have published data for those combinations and indeed AA hulls take less powder, especially the compression formed ones. The HS run very near what the Federal and Cheddites do, but "never more!" (E. A. Poe)
I used to scrounge all the 28 ga hulls I could find. I once picked up 150 Fiocchi hulls right after the guy finished shooting them on 5-stand. Worst hull I've ever run across. He told me so, that's why he wasn't picking them up himself. If I were
loading them, I'd use a Federal or Gualandi wad.