I've had fairly widely varying accuracy results with surplus from Russia, Romania, Czech, or Chinese, over the years.
It was all made to a decent spec, as far as I can tell. I think it depends more on how it was stored over the decades than anything else. Even sealed in spam cans, if it was stored someplace where the temperature spiked and dropped over the years, it can really degrade the powder. Most of the surplus x39 I've shot has been 40+ years old, so the storage conditions over that time are going to have a bigger effect than country of origin.
On the plus side, it has always gone *bang* reliably, even if the accuracy has varied a lot. But even the worst of it shot under 5" with an SKS (the best under 2"), so if you just want to plink and shoot gongs with it, it'll pretty much all do the trick.