I believe you said move the jib lead forward to depower.
That is not how I would do it. To depower a jib you would want to move the lead back to flatten the foot and open up the upper leach. You would also get as much halyard tension as possible to flatten the entire sail. In general though I would change down, lighter head sails are easily damaged when carried in too much air.
It is much easier to depower a main by flattening it as much as possible and dropping the traveler down, that is the normal way to temporaily reduce heel.