I've owned 2 858's, best group I could muster with one was a little under 3 inches @ 100 with a 4x scope. My first Chinese SKS could do 3-4 inches at 100 yards, I thought this was how they all were so I "sold it, will rebuy later" boy was that stupid. Now I'm in the 4-6 inch group.
I've seen on Youtube these type81 rifles were about the same as an 858, but I have no personal experience. I have seen Mosins shoot 2.5 inch groups with surplus ammo, I was shocked.