I have always used spent cartridges regardless of manufacturers advertisements. The idea of using a deprimed spent cartridge with the primer pocket filled with silicone gasket sealer or something similar is just as good.
Dry firing gives you the opportunity to practice trigger control, sight alignment, grip hold and breath control. It is good practice technique. Just make certain your handgun is not loaded with live cartridges and that your firing pin, regardless of how advertised, is protected.
If you want to practice with your handgun in a way that it approximates loaded field weight, load your favorite bullet into a spent, deprimed cartridge and use those for practice. This has always worked for me.
Hope this helps. Mikey.