Never heard of it until now.I don't know a single thing about it .......... tell me what you know!
.... Some is nickle plated steel. Nickle isn't cheap stuff.Steel case? And $0.60 a round?
About same.I use brass or nickel plated brass. I have shot one mag ( 30) through one of my ARs ( with no problems), but it wasn't my ammo or mag. I would never buy steel. Not because I have any evidence that it's bad or would hurt anything, it's just that ammo should be brass cased in my mind. If it ain't broke don't fix it.