Some person says that the conservative estimate would be 7 rounds per minute, meaning that slingers can fire more than that.

However, I need sources to confirm this. Does anybody have one?

Thank you

This article at Slinging.org mentions a rate of fire of 12 per minute (http://slinging.org/index.php?page=the-sling-...s-harrison)

Although pretty rusty now in the past I practised by firing into a river. With a loaded sling and two stones in my off hand I found I could hit the ripples created by the first stone with my second and third cast. I would think that grabbing stones at your feet or in a pouch would be only slightly slower.