I picked up some of the AA Super Sports hulls the other day and started to reload, but the new plastic cup in these gray hulls won't let the wad seat properly. I pulled a few wads that I was able to get seated, but the gas seal had been deformed. I saw the loading tips on the winchester site, but that was no help. Is it jus my wad choice? I've tried RP12s and Fed12C3s so far. Any tips?