Axel; be sure and have the smith recut the forcing cone; this is often very rough in J frames in particular, and your revolver will benefit from a more gradual angle on the forcing cone, as well as smoothing it.
Be very careful that the smith doesn't lighten up the rebound slide spring and main spring too much; you will get a better trigger pull, but the one I had became unreliable and would misfire on occasion.
Hope this helps, Walt