OP, PPU brass seems to be manufactured to military specs and has thicker sidewalls, which restricts case capacity. Other than that, if you do your part in properly maintaining the cases, the quality is pretty good. I found weight and neck wall thickness to be very consistent. They will withstand many reloads if annealed properly.
Lapua brass is excellent but you definitely pay for the extra quality and get appx the same amount of reloads out of them before they need to be re annealed.
I'm going to get some flak over this but some of the best brass cases I've had were from that bulk yellow box Norinco stuff, which some folks found to be corrosive primed in some lots. Mine were all fine.
As far as metallurgy goes it's ductile and durable. You need to be very careful with it though because some of the primer holes are off center and should be discarded. Most people just throw it away because they don't want to be bothered. That's fine.
If you attend gun shows, I can see from your location that there are several per year in your area, decent quality 223 brass sells by the bulk bags of 500 anywhere from $25 per bag but no more than $50.
If you have a close by range the RCMP use for practice they often leave their empty IVI cases behind and you can have them by simply picking them up after they leave.
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