I would try it out after Ruger corrects the issue. With any mass produced item, sometimes a mistake leaves the factory. After you get it back, buy (or preferably, reload) a pile of ammo to run it through the gun. This will build both your confidence and skill with the pocket revolver.
Also, dry firing is safe to do if the manual says so. Otherwise, Ruger would be replacing a revolver every time a owner RTFM (read the 'field' manual). I would get a set of snap caps if your going to do 500+ dry fires, but a few should not damage the gun.