The Monarch Blue Box .223 is indeed laquered steel cased. It smells horrible (like burning electrical) when fired but is accurate and feeds perfectly in my Mini-14. I have not shot it in an AR so no idea on its performance there. I dumped 4 mags worth (80 rds) into a regular old paper plate at 50yds with the iron sights as fast as I could pull the trigger when I functioned tested the ammo a while back. All rounds were on the plate so that is what I base my accuracy claim on. It is $5.29/box of 20 in College Station and they usually have 500rd bulk boxes available as well.
The green box 9mm seems okay. I've put about 4000 rounds of it through my Glocks in the last two months since I burned up the last of my blazer beer cans that I had stocked up. Two friends and myself used it in a recent steel plate match and a GSSF match in pensecola, and didn't see a difference in accuracy or the guns function with it over anything else that we've used in the paste. It ran flawlessly in 3 differient G34s, G17s, G26s, and a 17C and a 17L. Alot of the other competitors who don't roll their own were also using it and no problems reported or seen with them using it either.
I do see that it seems a little dirtier then some other stuff I've run through my tactical tupperware, but not so much that I'm cocnerned with it.
I've only tried there 5.56/.223 stuff in the green box variety (brass case) and haven't had any trouble with it.