Nope never, might not hurt some guns but some will become battered to death like 22's rimfire rifle and revolvers, m93 mausers, 95's &96's . They just aren't made for firing without the pin cushioning of a primer to fall against. Saw a LC Smith dbl once with both firing pin retainers broke out of it from dry firing. First thing I Iook at when buying a used revolver or 22 is the cyl face or barrel face to see if someone has dry fired it , if they have I just walk away. Mb
