A while back the bushings on one of my Smiths came out when I removed the grip screw. I hadn't shot the gun in 25+ years. Could I have overtightened the screws that long ago? Or could there have been some contamination and oxidation that locked everything up? The latter is a more likely scenario, but without a time machine, there's no way to be certain. Ever since, I've started using anti-seize periodically on grip screws. I don't do it every time because it can be messy and some residual is always left behind on the threads.