just got the gun back from the gunsmith after $290 worth of work. He said he had to remill the firing pin and that the cylinder had come back 1.15 mils? Basically he said the previous owner had "shot the hell out of it" and that "these 44 magnums are only good for about 250 rounds before you have to rebuild them. Is that true? Can I only expect to get 250 rounds out of the thing before having to spend another $290 to get the firing pin assembly remilled and all that?