PJ the question is were the crosshairs moving? Did they move as much as they should and your scope mount or rifle has something off on it? I've mounted many scopes that had all the travel they should have but the mounts or rifle were the problem that didn't allow the rifle to be sighted in.
Did you shoot the gun or just trust the bore sighter?
The crosshairs moved toward the vertical line, then stopped and would go no farther. The adjustment knob felt like it had run to the end of it's allowed movement.
Paul B.