They are so cheap and you can make your own. They DO NOT cause any appreciable wear on the firing pin. I don't care what anybody says but it's obvious that dry firing is not a good thing for any gun. If you want to take the chance....fire-away, but if you have some empty shell casings you can push the primer out of.....a well trimmed pencil eraser substituted for a primer is about as economical as you can get to make your own snap caps.

Sounds like the same person wrote that manual that I talked to one day. I called home to ask them why they insisted on putting in the same strength center-pin spring in a 22 j-frame AirLite as they did a 357-Magnum causing the center-pin to dig a trench that rivals the Grand Canyon in the recoil shield. The "expert" told me that would always happen because the center-pin was steel and the frame was aluminum. I have never called back to ask them another thing.