It needs to be a one shot in the upper body not just the head. An arrow in the lungs or heart would kill you. It just needs to be more competitive rather than a novelty weapon. A crossbow can’t beat shotguns, machine guns, pistols, Assault rifles, and sub machine guns at close range or sniper rifles at long range. The reload is what makes it useless as a two shot kill weapon and a faster reload would fix it. It’s only use is at medium to close range shooting from cover or running a second weapon to finish off targets. In reality an arrow does more damage than a bullet.