I dry-fire practice with my self-defense handguns a lot. If a defensive handgun can't absorb dry-fire practice, or if the manufacturer cautions against dry-fire practice, I personally will move on and choose one that will.
The below Q&A is from the S&W web site.
Q: Can I dry fire my Smith & Wesson?
A:
YES, except for the .22 caliber pistols which includes models 22A, 22S, 422, 2206, 2214, 2213 and 41.
.22 caliber revolvers such as models 17, 43, 63, 317 and 617 also should not be dry fired.
Q: Why can't I dry fire my .22 pistol or revolver?
A: Dry firing a S&W .22 pistol or revolver will cause damage to the firing pin.
FAQs | Smith & Wesson