I gotcha covered.  The video is potato, but the sound is awesome.  Kudos to grant6165 on youtube for preserving history in this manner.   We owe you for taking the time to upload video in 2015 rather than allowing it to waste away on degrading tape somewhere.  Kudos to http://www.wideopenspaces.com for bringing it to my attention.  I’ve been working on artillery fields this Summer and this was a great find!

5th Mass Battery at Fort McCoy firing in Wisconsin back in 1990.  For the first half, the camera is on the receiving end of actual black powder shelling (probably illegal now everywhere but military bases.)
Every single “whiiinggg” is searing hot iron fragments from 1-5″ in size that would take any selected body part off. Terrifying