Hello Greg I remember being told about that M60 incident and that is why we never carried a main gun round in that top ready rack tube the one that was closest to where the antenna mount was. I was always told that a flashlight battery could set off a main gun round. And I also remember hearing about the accident on the firing line involving the Sheridan. I was a tanker with M company from 1978 until 1980, tanks are deadly even in peace time. Stay well.