The only currently available wad that will hold a full 1/2 ounce in a once-fired compression formed (old-style)AA .410 hull is a Orange PC 410, currently manufactured by Down Range. The volume of the hull increases each time a it is fired. After a couple reloads the old AA .410 wads will work. After 5-6 reloads Remington of Federal wads will work. I don't have any experience with the HS wads.
Michael Goines