Don’t forget nitrocellulose, but have you the recent prices? Ridiculous! Most of my inventory was acquired before the pandemic.
Loaded ammunition, in some calibers, is at historic lows *if* you measure in constant dollars.
I watch .22 LR, which is almost a commodity.
The prices, right now (purchased on the Internet, including shipping) are at historic lows.
Easy to purchase good quality .22 LR for about 7 Cents per round, which in constant dollars is close to the same at 4.5 Cents per round from 1993 - 2007.
https://ammoseek.com/ammo/22lr?sh=low