20 ga Premiers load using same data as current Remington STS and Gunclub hulls. They are great hulls. They take a tapered hull type wad, ie, whatever would work in a Remington hull or CF AA.
Last time I loaded Activs was now 40 years ago. IIRC, they tended to have sunken crimps when I used recipes for AAs and Remington Premiers.
