I was thinking I just changed the spring in mine with one from a Wolf Spring Kit and it was pretty good. Yours could be different though and may need more. Been a few years since I had that gun and did the work, the memory is getting weak.
I did the wolf spring kit in mine several years ago and and while it's not a perfect smith and wesson trigger it is well worth the money, I am a trigger snob and I am happy with it,