There is a design lash point for the lobe family, but for a multitude of reasons, that may or may not end up being the overall best lash to be running on a given combo.

Tighter lash usually softens the “hit” to the lifter, which helps with lifter life, but isn’t always best for power.
Running the lash fairly loose can really speed up the valve action off the seat, and when the cam is on the big side can be an effective tuning tool to make some more power........but that can lead to some wear and tear issues if run like that long term.