I would not recommend steel cased ammo in anything other than an AK type platform. I had a problem with it in my SU-16. Works great with brass, though.
And that’s part of the reason that I wish someone would make the type of gun that I wrote about. I want a .223 that will eat ANYTHING and still use AR mags. And not be made with too much plastic. And no buffer tube.
Too picky, I know. There are guns that have some of these features, but not all.
If someone could make a Mini 14 that took AR mags, I’d get it. From what I understand, those things will eat steel case like there’s no tomorrow.