Empty Bullet

Type	Crafting material
Tooltip	Used to craft various types of ammo
Rarity
Buy	5 CC (Desktop, Console and Mobile versions) / 3 CC (Old-gen console and 3DS versions)
Sell	1 CC
Research	100 required

Empty Bullets are a Hardmode crafting material purchased from the Arms Dealer for 5 CC (Desktop, Console and Mobile versions) / 3 CC (Old-gen console and 3DS versions) each. While they have no function as ammunition on their own, Empty Bullets are used to craft Hardmode bullets with special effects.

Crafting

Used in

Result	Ingredients	Crafting station
Exploding Bullet50	Empty Bullet50 Explosive Powder	Work Bench
Golden Bullet50	Empty Bullet50 Gold Dust
High Velocity Bullet50	Empty Bullet50 Cog
Nano Bullet50	Empty Bullet50 Nanites
Party Bullet50	Empty Bullet50 Confetti
Venom Bullet50	Empty Bullet50 Vial of Venom

Trivia

(Desktop, Console and Mobile versions) An Empty Bullet is the cheapest purchasable item from NPCs.
- On the Old-gen console version and Nintendo 3DS version, the only items with a lower cost are Water Fountains, the Balla Hat, and the Gangsta Hat, which are sold—or rather given away—for free.
Despite their name, empty bullets are actually cartridge casing. "Cartridge" being the correct term for a bullet, casing, powder, and primer.
Each special bullet uses a component sold by a different vendor. Exploding - Demolitionist, Golden - Merchant, High Velocity - Steampunker, Nano - Cyborg, Party - Party Girl, and Venom - Witch Doctor.
Empty Bullets can be obtained pre-Hardmode by throwing Party Bullets obtained from Pigronatas into Shimmer, although this serves no practical purpose. The only item obtainable pre-Hardmode to combine with Empty Bullets is Confetti, which just re-crafts the Party Bullets used to obtain the Empty Bullets in the first place.