I have reloaded several thousand rounds of from the best I can recall about 4 years ago what was .223 PMC brass that was from SA, I picked up at a flea market about two 5 gallon buckets worth of it.
Lots of different headstamps in different country’s from different years show different points of origin.
It is a collectable past time in itself to collect cartridges and source headstamps/contracts.