Both the Barnaul and Wolf 7.62X39 feed, fire and extract without a hitch in my 7.62 Robinson Armament VEPR II.
Both the Barnaul and Wolf .223 feed, fire and extract without a hitch in my Bushmaster V-Match 16" AR15.
Both the Barnaul and Wolf .223 had some extraction problems in my Robinson Armament M96 before it was broken in, but both now function flawlessly. (I now mostly shoot only brass cased stuff in it, though, anyway.)
Both the Barnaul and Wolf rounds, in either .223 or 7.62, seem dirtier than "premium" (eg, Federal) American ammo, and a bit less accurate, too, but I can't tell much difference between Wolf and Barnaul when compared to each other, except that they do SMELL different; must use different powders. Best.