Check your manual. I don't know if your model is the same, but my Taurus 85UL manual has a little blurb toward the beginning stating that the revolver should not be dry-fired. I dismissed it as B.S. based on the assumption that all modern centerfires should be able too be dry fired with no problem.
I soon found out that, at least in Taurus's case, they meant what they said. Mine went back to the factory on the second day that I owned it with a broken firing pin from dry firing the gun while breaking it in.
Buy a set of snapcaps. They are a cheap solution to the whole issue. I have used them in my 85 ever since and I have had no further problems.