looking to better understand this.
The answer you seek is in understanding the fundamentals of economics. And in this case, the economic fundamentals of commercial ammunition.
In short, demand is elastic and supply is inelastic for this commodity. A surge in demand causes a decrease in supply as the ability of the manufacturer to feed that supply chain is outpaced by demand.
The iron rules are:
Demand rises, supply stays the same, prices go up.
Demand rises, supply drops, prices surge.
Demand rises, supply stops, prices surge rapidly until supply exhausted then prices are irrelevant (You cannot buy what is not available regardless of the price you offer to pay).
Conversely:
Demand drops, supply stays the same, prices tend to drop.
Demand drops, supply increases, prices bottom.
Demand drops, supply surges, and quickly the amount of demand in the market drops to near zero on a short time scale as all demand in that time period is satisfied. (You can only eat so many hamburgers. Once you've had your fill, you won't be in the market again until you are hungry again regardless of price).
What has happened with the commercial ammunition supply is thus:
Demand surged. Supply was fixed (what was on the shelf or in the pipeline). Prices surged. Supply could not keep pace with demand in the short term, prices continued to surge. As time has passed, demand has begun to wane, and unless supply is curtailed, prices will have to drop.
It's the law. I don't make it up, I just enforce it.