Lee Load All II works like a charm for Winchester AA, at least in my experience. I have fiddled with other cases as well, but not for quite a few years. Now that I am settled in my permanent home, I am going to dig it out and load a few AA's. With the price of cheap shells, it hardly pays, but reloading shotshells is a satisfying activity.
I also have a Lee slug mould, but have yet to use it. I wish Lee made a 20 ga. slug mould.