You might get a few different replies to this question
I have had a few of these excellent little carbines and all have been either Russian or Chinese military issue. I never shot one past 100 meters and the best I could ever get at that distance was about 4" for either three or five shot groups and I mean this was the BEST....all with the issue square notch rear, front post, tangent sights.
So, just a guess, but probably the best I could do with an SKS at 200 yards would be about 8 inches
These weapons were not designed to be or ever expected to be tack drivers at distance...they have other positive attributes other than accuracy at distance.