Bullets are made in factories on machines run by people, There has been an illness that hits people working in crowded buildings hard. It has been in the paper. Lots of sick, lots of dead, with more coming daily. May have slowed down production. Existing production would prioritize military and police use. 17 million guns have been sold this year, and we are in the midst of hunting seasons, Demand is high.
Shooting targets is a luxury event. Unless you are a subsistence hunter, this is a good time to ration your ammo.