In modern warfare, the ratio of bullets consumed to enemies killed is extremely exaggerated. It is not uncommon to use tens of thousands of bullets to kill a single enemy. Even if some guerrilla teams boast that they "eliminate one enemy with each bullet," in practice, it often takes an average of dozens of rounds to kill one enemy.
However, "how many bullets it takes on average to kill an enemy" is not directly related to "the combat effectiveness of an army." Some armies that overpower their contemporaries around the world can afford to expend tens or even hundreds of thousands of bullets to kill a single enemy.
In fact, in modern wars, many shots are not aimed at "eliminating the enemy" but at "preventing the enemy from having the opportunity to shoot at oneself."
In such situations, firing doesn't even need much aiming. If there's a suspicion that an area might host an enemy, just spraying a bunch of bullets over there will do.
