I never had much luck with my bring back Chinese Sks but it had seen some service. Part of the problem was the poor sights. They are great for close combat, lousy for shooting at 100 yard and further targets.
I replaced my front sight with a thinner blade. It made a huge difference. But still suck for anything other than decent light, okay contrast, within about 200 or 300yds. That said, Wolf military Classic can shoot close to 1MOA sometimes. Averages out under 2 (most steel cases with it is 3. It hates Tula).