That amount doesn't strike me as large if spread across the entirety of the Bundeswehr, which has some 200k personnel and a budget of $50 billion according to Wikipedia. However, the article mentions 48k more rounds missing from the KSK, a unit of only 1,100 men that's apparently had issues with some members holding extremist attitudes. 48k rounds missing seems somewhat significant at that scale.
https://www.midsouthshooterssupply.com/dept/ammunition/rifle...