In this chapter, we learn that the bullet is a "bullet of compulsory time jump," which means that it can only be fired once every 22 hours. This means that if the bullet were to be fired every hour, it would take three hours for the bullet to reach the target. The bullet also sends the target three hours into the future, which is why it's called a "time leap." The bullet is also a time-sensitive projectile, meaning that if it were fired every day, it wouldn't be able to reach its target until the next day. The only way to stop this is to use the bullet as a decoy, so that the bullets don't hit the target until they're too far away. This is a good idea, because it means that they'll have to wait until the bullet hits the target before they can use it. This way, the bullets won't waste their ammunition, and they can still use it later on to hit the next target.