I bought a used American Western Regulator with brass grip frame and 5.5 barrel, dual cylinder. Shoots good and accurate. Looks good and feels tight like a new one. Only problem, the firing pin comes to a rough jagged point that tends to pierce the primers. I plan to smooth it out but would like some recommendations before starting. I plan to use the rubber wheel on a Dremel Stylus to take the rough edge off. I would like some advice on rounding the pin off on the tiny tip.