now this may not apply to all scopes, but ive noticed that atleast the PU scope on the SKS can be VERY misaligned when not perfectly ADS'ing
this isnt a gigantic issue but it got annoying very quickly because you cant hold any angles very well, you have to aim straight down the scope without aiming anywhere left or right, or else your scope will not indicate where the bullets will actually go
i will make a video later