I have a 1982 Chinese SKS that has started jamming shells in the chamber. After firing, the spent shell is stuck in the chamber. I thought it may be the new type of ammo I was using, but found some old shells I had fired previously, and they also are jamming. In fact, when I put them in, they wont go all the way into the chamber, preventing the bolt from going into battery. I have to let the bolt fall all the way from fully back to get it to go into battery. Then the shell is jammed. I have been using a 1/4" brass rod and hammer to get these out of the chamber.
I have tried thorough cleaning with solvent. I have tried a couple minutes with a Hoppe's bronze brush (not sure how well that worked as it is intended for a .30 cal barrel, which is smaller than the chamber). I'm thinking of spinning some 0000 steel wool in the chamber with a drill.
Does anyone know a fix for this problem?