"Brass" to avoid
Dodgestdshift--If you want to talk "other than BRASS," then the answer is easy: Don't try reloading any of it. Scrap it.
Blazer Al cases weren't made to reload, and IIRC, they are Berdan primed, which adds to the problem.
Steel cases, if Boxer primed,
can be reloaded--it has been tried successfully and reported on--but the question is, WHY would you bother--It's that much harder on yr dies and equipment, requires that much more force from you on the press handle, and good BRASS cases aren't THAT expensive.
Any Berdan-primed case, be it steel or brass, will be a hassle to reload, requiring extra equipment and a supply of the Berdan primers (Berdans are a different size than Boxers, and are built differently--definitely NOT interchangeable!)
The ones I find most annoying are the "copper-washed steel" 7.62x39 cases, which look a bit like brass and can be picked up by mistake. They are simply steel cases in disguise.
The best thing to do with any of these, of course, if you collect a quantity of them and keep the different metals separate, is to take them to a recycler or scrap-metal dealer and sell them for cash money. With the cash money you can buy nice clean new brass to load!