Have done it before , will do it again and actually have some .223 I loaded 20 years ago in the vibrator now but haven't turned it on yet. I found a cardboard box of 800 rounds on strippers in the garage that had some green growing on it . Never had any problem with doing it before but I don't leave them in long term , usually 30 minutes or less, more often than not on the less. As someone above stated they get the vibration treatment in the manufacturing process so why not.
