I think your problem may be that you are using tapered wall hulls. Almost all of Ballistic Products' components are designed to be used in straight wall hulls like Federal, Fiocchi or Rio. You can find a few recipes that use tapered hulls like AA or Rem STS, but they never work without bulging in my experience. Your gas check is sized to fit the larger diameter of the straight walls and they make your AAs bulge. I was almost pulling my hair out over this situation until I tried Fiocchi and Federal Gold metal hulls.
As for the caved in crimps, they are caused by the large sized shot. It lines up around the perimeter of the hull and leaves a space in the middle, and the plastic caves into this. If you add a thin card wad, it usually helps the crimp a lot. The caved in crimp won't hurt the performance of the load, but it usually reduces hull life. For specialty loads you'll never beat the looks of a roll crimp, but I'm really picky about my crimps looking nice!