I am currently using 28 gauge AA hulls with Winchester 209 primers, Universal Clays powder, with Clay Buster wads. I can purchase Cheddite primers for $5. a box cheaper than Winchester 209 primers. I can't find any load data for 28 gauge Cheddite primers in 28 gauge AA hulls. I was told "There all the same " just use Winchester 209 data. I dont feel safe on those words alone. If any one has data in print or a web site I could refer to I would fell better. Any information on these primers good or bad is welcome also.