The adjustment screw on my RCBS 5-0-5 will raise the scale to move the pointer beyond the range limit. Picture below shows the adjustment screw turned out more than thickness of bottle cap and there's plenty more threads left.
If OP's scale looks like this and still needs bottle cap under the adjustment screw, there's something wrong.
That's the way it looks, and I do need the bottle cap under it. Then I can run the adjustment screw in just a little bit to zero it. I don't have check weights, but weigh a 50grn. bullet, a 125 grn. bullet, and a 170 grn bullet. They are all spot on, +/- one or two tenths. In between and at the end of of a loading session I move the weights on the beam back to zero just to make sure it is still on zero, and it always is.