In other situations, Soldiers are given Article 15’s, ordered to perform corrective training, or ordered to become range certified.
This is a serious issue—the potential to kill someone can not be downplayed. Saying “no one was hurt” is not an excuse. You need to deal with this in a serious manner that fits the circumstances.
The property damage to the commander’s car is an issue as well. That will at least require an MP report which means it will show up on the blotter and probably wind up with the chain of command getting a call. I am sure this will also result in a serious incident report as well. This leader is going to get a lot of unwanted attention.