As most people have actually explained how bullets work, I think I'll throw out a fun fact:
One of the reasons why lever action rifles are not as accurate as bolt action rifles, is that they have to use soft tipped bullets. This is because they are kept in a tubular magazine, one after each other in a row, if they have pointed tips dropping the rifle would cause all of the bullets to discharge because of this. There are now pointed rounds for lever guns that have a rubber cap on them to prevent this. Also another reason they're less accurate is because with every shot the barrel weight and other factors change as rounds are removed.
One of the reasons why lever action rifles are not as accurate as bolt action rifles, is that they have to use soft tipped bullets. This is because they are kept in a tubular magazine, one after each other in a row, if they have pointed tips dropping the rifle would cause all of the bullets to discharge because of this. There are now pointed rounds for lever guns that have a rubber cap on them to prevent this. Also another reason they're less accurate is because with every shot the barrel weight and other factors change as rounds are removed.