In 1989 S&W incorporated many performance enhancements on the Model 29.
If your library has any old Shooting Times magazines look for the article from the September 1989 issue by Dick Metcalf titled: “S&W’s Model 29, Redesigned With strength in Mind.” At this time all of the tolerances were tightened up and these are fine revolvers. I have one of the 5” Classics and have shot it quite a bit with 300-grain bullets. I wish I could shoot up to the potential of this revolver’s accuracy but I will say that after many years of practice the Model 29 shows no sign of wear, has lost none of its accuracy potential and is seemingly: indestructible.
One of the things I did early on was to buy several different heights of front sights. I adjusted my loads so I could change bullet weight and velocity while maintaining the same (approximately) point of impact.