I'd suggest to you that you get rid of that ammo you have! And I don't mean shoot it! That ammo is Chinese berdan primed CORROSIVE AMMO! The salt primer used in that ammo will send salt/corrosive gas into your M1 piston system. You can't clean it out unless you take the piston nut off and clean out the whole gas system. A regular cleaning won't clean out the salt from the gas system.
The piston nut is usually staked shut and you will need a piston nut wrench to get it off. Over time the corrosive salt from the primer in the piston will start to corrode and ruin the piston/piston chamber and weapon.
New 30 cal ammo only cost $20 t0 $25 30 a box.... do you want to destroy a $500+ M1 carbine just to save a few bucks shooting some cheap corrosive ammo?? For me its not worth it!
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