Scoutmaster,
Granted, the HS hulls do take the same data as do the CF hulls, however, there is a difference in volume, with the HS case being the one with slightly less volume.
One of the problems we now have with these cases is that when using the more bulky 20 ga. powders such as Unique or Universal, it requires a tad too much wad pressure and the result is residual pressure from the compressed wad, pushing up on the crimp and bulging or popping it open sometimes.
Since the Duster wad is one of the taller wads for the 20 ga., they only exacerbate the problem. The Down Range DRV Versalite wad is the perfect fit for the AA HS cases, and loads with little or no wad pressure and allows for perfect crimps.
So, as he apparantly has found, the Dusters do not work well, and is asking for advise.
One thing that should be mentioned is that the Duster wads do work quite well in 3/4 oz. loads in the AA HS 20 ga. cases. The smaller capacity, combined with the taller wad, makes good crimps easily accomplished with this combination.
DLM
