I just mounted a scope on my sks the other day, but i've got a problem. When i went to sight it in, i had to keep moving the crosshairs up, until they finally wouldnt go any higher, and the gun is still shooting low. I've got the kind of mount that replaces the dust cover, and the scope, mount, and rings are Norinco. Anybody have any advice?

move the scope down,not up

I'm actually turning the scope down, but the elevation knob up.