Source: The Great Interpretation of Dreams (Ibn Sirin)
(By analogy with an arrow) A bullet in a dream indicates hurtful and harmful speech, or a messenger with bad news. Being hit by it indicates falling into harm or hearing what one dislikes.
Source: Perfuming Humanity in the Expression of Dreams (Al-Nabulsi)
(By analogy) A bullet indicates the quick fulfillment of a need or reaching a goal quickly. It may indicate a sudden worry.
Source: Signs in the Science of Expressions (Ibn Shaheen)
(By analogy) A bullet is interpreted as swift news. If it hits its target, the news will come true. If it misses, it will not.