A case box, 5.56mm is a type of miscellaneous item in Fallout: New Vegas.
Characteristics[]
Case boxes contain casings used in crafting the type of ammunition on the label. Each box contains 25 casings for 5.56mm ammunition.
Uses[]
Ammunition casings are used in the crafting of ammunition at reloading benches. Combine one 5.56mm casing, 12 lead, four rifle powder, and one small rifle primer to create one 5.56mm round.