I had several of the 'new style' AA cases (not the HS cases but the ones brought out to replace the old compression formed AA case) cough up the base wad. These cases were reloaded on a progressive loader that reprimed by pushing the primer into the hull while it was supported by the rim. Not by pushing the case down onto the primer with a ram inside the case upon the base wad. After changeing over to a loader that did reprime by supporting the base wad, I've had no further instances. I suspected in the beginning that the base wad moved on fireing. After the change over in loading machines with the different repriming support of the base wad, I was rethinking that it was the repriming that was pushing the basewad out of it's 'socket'. I had 12 moved base wads in approx 5000 reloaded AA cases. None since the switch. I reload the cases till they're dead. I use the same load as always, a light 7/8oz right out of the Lyman manual. The base wads moved high enough in the shell to make the shot drop level with the top of the hull (but that height was probably even as a result of the powder drop tube pushing the wad back down into the hull to a uniform depth on each). Thats what originaly brought it to my attention. Never had one where the wad left the hull completely. I've never loaded any of the HS type hulls. Still have plenty of the one piece and the second generation 2 piece left. Both load nicely and I use them in both break open and pump guns.
