He was certain of this because of the debilitating effect of the bullet and the sensory overload tactic.
The bullet alone was enough to give the soldiers an overwhelming advantage. One bullet was enough to kill the vampires. The single bullet will cause the vampire to collapse and turn into dust in a few seconds.
This was soft course because the vampires were very weak. Stronger vampires will be able to resist the lethal effect of the special bullets for much longer. Some of them might even be able to remove the special bullets and heal.
As for these weak ones, their fate was sealed with just one bullet. But there wasn't just one bullet; there was a hail of them.
To top it off, the vampires didn't know where the bullets were coming from. They couldn't dodge the bullets because of the sensory overload.
And when they were hit by one bullet, it was highly likely that they would be hit by more. So in no time, the vampires were felled.
