They're fine. The aluminum cases aren't reloadable, at least I wouldn't try unless I were desparate, but they work just fine.
Steel cased stuff is fine too, it's a very mild steel they use so case expansion may not be *quite* as good as brass, but it still works fine and won't damage a properly designed gun.
Looks to me like only 5 out of 9 on the supreme court can read.
Sub Club #180