I wouldn't worry about the german self-destructing cannon shells, i'd worry about the hispano suiza 200 000mm autocannon. No pictures from the test facility of the first test firing exist, but a nearby grunt squad were having lunch during their long march and caught it on camera. The test facility can... erhm, could be seen in the background
Luckily only one round was fired before the gun was destroyed from the blast. Imagine the magazine emptying completely.
Luftwhiners, beware!