My lightly used 1991 production 7.62x39 rifle will not reliably fire WW white box ammo. The prices,er has deep indent but did not fire. Same round in my SKS fired. There is no grease/shavings around firing pin. I assume the WW has harder primers than regular "sporting" ammo. Surplus Berdan primed ammo, same issue with failures to fire.
Recommendations?
Recommendations?




















































