In the real world, bullets go where they want to go and as far as they want to go. One of the four rules* for safe gun handling is "Know your target, what's in front of it and what's behind it." That's because it might miss your target and hit something (someone) behind it, or your bullet might pass through the target and hit something (someone) behind it. In Hollywood movies and television productions, this rarely happens. Hollywood has trained us to think bullets only go as far as we want them to. Which just isn't true. A bullet will travel (sometimes miles for rifles) until it hits something that stops it.
Oh, and guns don't make a cocking sound when you draw them. I'll never get tired of pointing that out.
*The four rules of safe gun handling are:
- Always point the muzzle in a safe direction.
- Always treat every gun as if it were loaded.
- Know your target, what's in front of it and what's behind it.
- Always keep your finger off the trigger until you are ready to shoot.