Twice tonight I've read about avoiding lighter bullets in a revolver for the sake of wear and tear, once about avoiding 110 gr .38 Spl +P, and another about avoiding 125 gr .357 Mag in a S&W M19. Why is that? I thought heavier bullets would do more damage but obviously I'm wrong. Do the lighter bullets allow (or need?) a larger powder charge to get them moving faster to be effective, and that's what's bad for the gun, the charge? On a related note I have some 180 gr .357's meant for hunting from Federal that I bought to use in a Marlin 1894 that I later sold... can I use these in a M19?