Ammunition

Ammunition is the term used for expendable ordnance material used in charging firearms of all kinds; as powder, balls, shot, shells, percussion caps, rockets, missiles, energy, etc. The purpose of ammunition is to project force against a selected target or area.

Special and no ammunition required
A few weapons in the Fallout games do not use ammunition in the traditional sense at all. These are:
 * Meat Cannon (Fallout: Brotherhood of Steel)
 * Rock-It Launcher (Fallout 3)
 * Solar Scorcher (Fallout 2)
 * Vault Dweller Red Ryder BB Gun (Fallout: Brotherhood of Steel)

Manufactured
It is shown in The Pitt that ammo is still being produced in The Pitt and is being used by Slavers in the Capital Wasteland. The Slavers trade their latest roundup for a large supply of bullets, which are later traded to the caravans for other goods.