I still have garbage bags full of old compression formed AA 12 and 28 gauge hulls that I'm jealously hoarding, but I have loaded probably every permutation of hull that has come down the pike and my experiences mirror those above comments. The Super-X hulls you refer to are built like HS hulls but are made with a lessor grade of plastic, they will load ok for one or two loads but will not stand up to many reloads like the AA's All of the 28 and. Some of Winchester hunting shells were made in CF cases, but there are no current 12 or 20 gauge hunting loads made with the HS hull. 12 gauge HS hulls are made in red and in dark gray. This is so the same reloading data can be used with both hulls. Winchester wanted the interior of the HS hulls to be shaped the same as the CF hulls, so the separate base wad is shaped to match the taper of the CF hull. They are made from tubes of plastic with a separate base-wad crimped in by the brass base.
The current HS have an "H" on one side of the base and "S" on the other. The early HS hulls had no external markings to indicate they were HS. The second and current generation are the HS hulls and were introduced around 2002. They can be found in several shades of Red, and Silver (light gray). By the time it gets to the base the wall of the case thickens so there is just enough room for the primer to stick through. These hulls start off very then at the crimp and tapers in as it gets closer to the base. The are usually referred to as Compression Formed of CF hulls. They started out as a pellet of plastic and were formed in a die, later in the process the brass head was added. The original AA's came out in the 1960's and are of one piece construction. There are 2 generations of AA 12 gauge hulls.
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