Solution: don't use Wolf ammo any more (it's Russian-made using laminated steel case instead of brass). I got it as cheap practice ammo, but it's not worth the risk
Thanks for the warning about Wolf ammo. I've been using a bunch of it in 7.62 and have experienced a lot of misfires. About 10-15%.
I only hope the Russian Army doesn't rely on it when the time comes to face the Chinese....
I fired about 1200 rounds of Wolf through a Glock 19 over a three day period without cleaning the weapon. At the end of the final day there were so much lacquer and gunk built up in the weapon that it wasn't consistently extracting. I also didn't have the confidence that the ammo was consistently hitting where I was aiming, and I was blaming the ammo for what might have been my poor shooting. I also had several hard primers that did not go off, which I don't really mind as they provide a good failure drill.
I don't use Wolf for serious training anymore, though I'm fine taking it out to the range for plinking duties.
That is excessive for any ammo manufacturer, even Wolf. I would hold onto the misfires and complain to the guy you got the ammo from, or even back to Wolf.
Then again, perhaps it's a problem with your rifle, with the firing pin not hitting the primer hard enough or in the right spot. I would give a box to somebody else with an AK or SKS and see if they have the same misfire rate. The AK and SKS are specifically designed to work with that design of ammo