About 1963, I decided to hot rod my Remington-Rand with some loads recommened by Jeff Cooper. The bullets were 200 grain cast really whistling down range with a mega dose of Unique. All was good until about the 10th round, when the firing pin stop hit the ground followed by the fireing pin and spring. It took some time crawling around in the West Texas dirt to find all the parts. After a good cleaning and reassembly, the pistol worked just fine for several more years with normal pressure loads.
I have been cured of hot roding a 1911 pistol since that day.