Minecraft wiki entry for Combat, associated text: Arrows: Will be fired is a similar fashion to a skeleton's arrows with a slight inaccuracy, dealing 1.5 hearts of damage per shot. Simply right-click the dispenser, and load the arrows into the nine-grid squares. A dispenser can be loaded with up to 9 stacks of arrows. Dispensers can also be loaded with tipped arrows which will apply status effects to whatever mob they hit in addition to the contact damage.