This is how I imagine you, but with 9mm
Kidding, Time to lay in a supply was "before." How much "before" will/would guide prices.
I remember trying to start shooting in 2013/2014; you had to get to WalMart just when they offloaded ammo, in order to snatch up a couple boxes of Winchester "battle packs" they had left. It went quickly. I ordered many a round of reman from places like Freedom Munitions to save a few bucks. LGS prices were insane; when I found out about "defensive ammo", I was horn-swoggled at the prices they wanted for a box of 20 cartridges of Black-Death Super-Velocity Raptor-Claw Jacketed "Man Stopper" rounds.
I do feel sorry for those who are genuinely concerned about their safety, manage to find, let alone actually purchase, a hand gun, only to find out they simply can't locate average quality practice and training ammo. But if demand goes up 10X, in the shit show that is 2020, the fixed supply of raw materials, production capacity and supply chain flow isn't going to keep up, and the only adjustment that can happen it to raise the prices.
It's economics 101.