Great strides in smoothness and lightness of trigger pull can be made. A combination of lighter springs and polished parts can make a significant difference. For PPC shooting that is done double action only, it can be taken to the extreme where the gun is modified to shoot double action only, hammer spur removed for safety and the gun will be beyond belief in light and smooth. Doubt this second option appeals to many, but a good pistol smith can do wonders with a S&W. Proper timing, indexing, clearances all make the gun shoot even better, and the polishing work along with lighter springs will make it a pleasure to shoot double action. Once the da is smooth and reasonably light, after that its your shooting challenge to learn to handle the gun and hold the sights steady as you squeeze off the shots. There's always going to be some challenge to it, but thats part of the fund and what improves with practice.