Well if you can't find 9mm ammo you can always find 9mm cases at any range & reload if you have stocked up on supplys. Every time I go to the range 9mm cases are laying everywhere.
Unfortunately during prior panics I’ve noticed people are much more likely to start keeping their brass or even try and take your brass because they “want to reload eventually”. There was a guy at my local range that’d have his wife sweep up everyone’s brass because “his Dad was going to show him how to reload”. I had to tell them multiple times stop stealing my brass because I actually do reload.