I tuned my 10-14 with Wilson Combat springs, a semi-target hammer, extended firing pin,rebound slide trigger stop.....not much effort and I shoot ragged holes with it at 25 yards.
It's a 4" fixed sight revolver that shoots like a match revolver. It's great in DA but in SA it really shines, the SA trigger break is so light and crisp it's unbelievable.
Some of my bone stock revolvers shoot so well people can't believe I haven't done any "work" on them. Most of my revolvers are stock, as they left the factory, if they work and shoot well I don't see a need to mess with 'em.....I learned the hard way "if it ain't broke, fix it until it is!" is not a good motto....
This 28-2 is bone stock, just that it had a Buehler mount and a 1.5x Redfield added. Adding a scope really brings out the mechanical accuracy of a revolver, since variables like sight alignment are eliminated. I shot this group at 40 yards with 158 gr. .38's from a sandbag rest, and the gun can no doubt do better. I will never remove the sideplate on this one, and it works as is so it will not be "slicked" or worked, there's just no need. I'm not gonna get it to do any better than it does. It has no trigger stop, or any other little gadgets and it shoots just fine.
We spend so much time trying to squeeze accuracy out of our S&W's, but the truth is, out of the box most of them shoot better than we can hold anyway

Check out the YouTube video of the guy hitting milk jugs at 100 yards shooting DA with a Model 60 1 7/8"....other tests have shown Ransom Rested magnum revolvers can shoot surprising groups out to 300 yards once the trajectory is "dialed in" and all human factors are eliminated, we're talking maximum repeatability, the muzzle of the gun not moving at all from shot to shot, something a human shooter cannot do, but those rounds will drop right in there........ and that 4" barrels are slightly more mechanically accurate than 6".......the trick is, becoming a trained and skilled shooter is reducing that "human error" like pulling shots, sight alignment errors, breaking wrists down, etc.