I'm not sure of the accuracy of these films. Its open for discussion.
30mm Mk 108:
https://www.youtube.com/watch?v=daiJ5arnPlw
20mm:
https://www.youtube.com/watch?v=bdr4ngshWl8
30mm Mk 108:
https://www.youtube.com/watch?v=daiJ5arnPlw
20mm:
https://www.youtube.com/watch?v=bdr4ngshWl8