The other day I was shooting my Yugo SKS with mixed ammo, Wolf, Tula, and American stuff.  I have had this rifle for many years now and have shot it without any issues, but this past shooting session I had a few failures to feed and one blown primer.  Ive never had this to happen before.  Only happened with the Russian ammo.  American worked every time.  Do ya'll think its the rifle or most likely the ammo?

If I had to guess I'd say cheap Russian ammo, I'd had lots of cracked necks with the Tula new production.
Now toss in some 5 year old Wolf, no problem, or brass cased ammo is 99% fine too...

Been seeing posts saying similar things about Tula.  I'm gonna shoot the Tula I have and move to something else

I was thinking it was ammo related and not the gun. When I first bought it American brass cased ammo was cheap. This was my first time with Tula.  Only issues I have with Wolf is the random failure to fire.