help me w/ sks FTF

[Jrob24]

My chinese SKS has been jamming every 25 rounds or so. The bolt will close on a live round facing upwards. The bolt seems to be moving smoothly. Right after buying it I field stripped it and cleaned the gas tube. It contained some greasy black stuff (cosmoline?) I left some of it in thinking it was needed as a lubricant. Should I clean it out and spray some rem oil? What else might be causing the problem?

 

[SodaPop]

Don't rule out the fact that the spring inside the fixed mag could be bad. Mine went bad after about 500rds and I replaced it.

You really should pick up a few springs and keep them around. Box mags wear out, and so do the little springs inside your SKS.

 

[DMK]

Does it still have the original fixed magazine in it?

 

[Jrob24]

Does it still have the original fixed magazine in it?

Yes, the fixed 10 rounder