sks ejecting very dirty brass

[u/Spiritual_Rope_6952]

i have a chinese sks, cosmoline all cleaned up, but when i shoot it (norinco non-corrosive) the cartridges come out all dirty with some kind of soot all over them. is that normal? otherwise it works perfectly and ive never had a jam. ive just never seen a semi auto ejecting brass so dirty before

[u/Fresh-Efficiency-352]

Shitty chicom surplus ammo that runs super sooty + the blow back from the steel case cartridge not sealing very well perfectly normal might raise an eyebrow if youre firing brass cases and you get the same effect though