From Stardew Valley Wiki
|Fire this with the slingshot.|
|Source:||Crafting (Combat Level 8),|
|Ingredients:||Iron Bar (1) Coal (2)|
Explosive Ammo is an explosive; it is a one-time use item. It damages anything within its explosion radius, but unlike other bombs, it must be shot with a Slingshot.
Explosive Ammo has a radius of 3 tiles.