If you haven't invested in at least the knowledge of producing ammunition from scratch, now's the time to get that knowledge.

Brass and steel cartridge cases, primers, bullet jackets require presses. Forming a cartridge requires a number of machine steps, but an alternative is a cartridge case mostly made of plastic with a metal rim with a hole for the primer.

Corbin swage press for the bullet jackets.

One good thing about clandestinely produced ammunition will be the opportunity to experiment with varying compositions and designs that allow extended terminal and probably ballistic performance-say for example you sabot the 7.62x39mm to a 6.5 130 grain to duplicate the expensive and soon to be unavailable 6.5 Grendel.

Big bottlenecks will be the production of new powder and primer compounds-doing so safely and with consistency, without which you're going to wind up chruning out something South of old combloc ammo where they just chruned the shit out.

The chemicals themselves if there isn't labs set up to brew it are going to be hard to find, probably near impossible in a deliberately collapsed economy.