My brother-in-law shot 680 series trap guns in competition. I own and have owned many 680 series guns, but never shot one enough to wear it. He, however, shot thousands of rounds a year. He mentioned several times that he always had his gun tuned up byt the Beretta people at Vandalia in order to avoid an unexpected breakdown. This was several years ago, but he said they did it on a walk-in basis and replaced the trunions, hammer springs and lubed and checked the internals for a very nominal fee in just a few minutes. I doubt they were fitting the parts in that scenario.
