Just read a thread in a foreign forum regarding defective .223 Wolf FMJ (grey laquered shell). Defective are the primer (sqashed in production or smth like that, or seated too deep), neck (generates cracks or separates from the shell body) and sometimes bullets (appear to be seated not enough deep, which results in original crimp sitting above the neck and additional crimp created during seating).
Results of all that can be anything from misfires to kaboom after separated neck lodges in the barrel.
Inspect your Wolf ammo before you load. It's a good idea to measure OAL too and sort the rounds into several groups, as the tolerance of Russian manufacturer are, ehem, questionable. I measured 7.62x39 Wolf a few months ago and found large deviation inside one lot. Weight will differ too, but sorting by weight is pointless, as we do not know what the difference is composed of.
Results of all that can be anything from misfires to kaboom after separated neck lodges in the barrel.
Inspect your Wolf ammo before you load. It's a good idea to measure OAL too and sort the rounds into several groups, as the tolerance of Russian manufacturer are, ehem, questionable. I measured 7.62x39 Wolf a few months ago and found large deviation inside one lot. Weight will differ too, but sorting by weight is pointless, as we do not know what the difference is composed of.