No, because vacuum drops off when the throttle is open. That said, it's not uncommon for timing to be "around" 60 degrees at part throttle when the vacuum advance is activated. Perfectly normal.
I mean when it’s hooked to ported vacuum, or “timed vacuum” as it’s called on the diagram. It’s the port that gets the same Venturi as the jets I believe? Manifold vacuum decreases under load but Venturi “vacuum” increases does it not?