I’m not a big fan of Russian ammo (Wolf, Tula, etc.). In my experience the cartridges have a coat of lacquer that can gum up your weapon. Also, their casings seem to be “unfriendly” to many modern weapons that have tight tolerances. However, they’re not bad in commie weapons that have tolerances you can drive a Buick through.
WPA is polymer coated. Golden Tiger is lacquer coated. Both do well in my Saiga, but after 3 or 4 mags at the range and the gun gets hot I get like an oily film on my glasses with the Golden Tiger. I don’t know if it is heated lacquer blowing out or some very fine lube on the cases.
I ran several thousand rounds of WPA in my RRA AR15 with nary a problem and then I got this one jam with the case in the chamber that was *very* difficult to get out. Since brass cased ammo had come back down in price I sold the rest of the steel.