About 25 years ago I went to a three day wedding at Eastover Resort in the Berkshires. On the third morning the bride mowed down a concrete block wall with a hundred rounds out of the resort owners 45/70 gattling gun. It was an awesome display. In 1976 at a Bicentennial show I saw the same gun take down a wall in competition with an m60 manned by 2 National Guardsmen. That gun jumped around throwing those big slugs faster than the guardsmen could move the m60 and took it down with time to spare.