[Glenn E. Meyer]

Actually, I know one - it might be destroying but not in our sense.

I've read there are special large bore shotgun like things that are made to loosen some scale deposits on the inside of blast furnaces. Some giant gauge by Winchester.

True the tech is derivative of killing guns. Also, cannons are used for dislodging potential avalanches - but they are surplus military weapons. There are compressed air device to do the same.

But I agree with the main thrust - guns were designed as weapons. The sporting uses are derivative of practicing for the weapons use (people or animals as targets). They are protected by the 2nd Amend. as killing instruments.