Look, I don;t mean to be mean spirited by saying you were "born yesterday" but what's it going to take? Will a friend have to plan an intervention and hit you on the head with a hammer until you let go of that Chinese piece of SH_T???
Yes, some Chicom SKS's are ok, but that is NOT one of them. I've had over a dozen SKSs now and NONE of them ripped brass in half. Not even commercial brass. The fact is your rifle's chamber is either reamed to too big a diameter OR the headspace is horribly wrong.
Either way, shooting it is like asking god to smite you and then walking across a busy highway hoping a vehicle won;t slam into you. It's really THAT STUPID.
what the heck is the problem here??? RETURN IT. Who cares what SIR says. Jsut ship it back with some fired cases. Write a short letter telling them it's unsafe and you expect a replecement. Keep copies.
If it's just laziness over not wanting to degrease a replacement rifle... well... that's no excuse.
STOP SHOOTING IT. Seriously. Please.