I would by all means suggest installing a Wolff reduced pull weight spring kit. They are inexpensive and your firearm will still be TOTALLY 100% reliable. For less than 20$ you can instantly reduce double action trigger pull weight by at least 30% by ordering/installing the kit which offers options of how much weight by including multiple springs with different compression strengths.
I just did this with my 642. Made a nice change in the weight of the trigger pull...it was already smooth from lots of dry firing. Be warned...the rebound slide and spring can be a booger to reinstall. Brownell's has a tool for it that makes it a little easier.