Got a Yugoslavian sks w/grenade launcher in a trade. Barrel was in bad shape. Lands and grooves looked ok after I spent several hours cleaning it. Took it out to test fire. Ammo was win white box. 1st case didn't fully eject, got caught sideways. Next 9 rds didn't even make it that far out. Yes the gas was turned on.
Recleaned the gas system, took apart and reoiled moving parts. Still not ejecting. Switched to some surplus ammo, still nothing.
Any ideas?