HockaLouis, let me guess, you're an AR guy.
Here's a news flash for you. I was in the service when the M16 came into service. They were crap and they stayed crap for a long time. They've improved greatly over the years and that's fine. They're just not for me. I don't spend time knocking them or stating that the Mini is better, life is too short for such bullsh*t. If you need to inject yourself into this thread, then try to add something useful.
When I took it for its first range trip, I shot two types of steel (Wolf & Tula) and brass as well. It ate them all just fine. This is my fourth mini and all of them ate steel cased ammo without a hiccup. It's a dependable platform and I have history with it.
“If ye love wealth better than liberty, the tranquility of servitude better than the animating contest of freedom, go home from us in peace. We ask not your counsels or arms. Crouch down and lick the hands which feed you. May your chains set lightly upon you, and may posterity forget that ye were our countrymen.” ― Samuel Adams