I have a recent production "Classic" 19-9.
The DA pull is horrendous, several pounds heavier than stock K-frames made years ago but only slightly rougher. SA is also heavy, about twice what a K-frame is normally.

Dry firing and polishing would doubtless make them smoother and a bit lighter, but there's no way in h*** that DA would become reasonable without lighter springs. I put the Wolf 15 lb rebound spring and that helped. Wolf Power hammer spring went in and got light strikes with some ammo, went to a longer strain screw. Now it's reliable with any ammo and both the DA/SA pulls are much lighter. Not as light as my factory-tuned 66-6, but worlds better than stock.