Its better to injure and possibly kill the enemy than missing him.

When you're fighting a war, it's generally better to injure the enemy, rather than kill him. Killing one guy deprives the opposition of one guy. Injuring one guy deprives the opposition of that one guy, the two or three guys required to get him back to medical assistance, the dozen or so medics back at the hospital...

This is why anti-personnel landmines maim, rather than kill, people.