It deals 1300% damage at level 10 and has a 10% chance to blind you when you use it.
I know our description says there are not flee or hit reductions, but the iRO version (I know we run on a base of kRO - I'm just pointing it out) according to iROwiki says this
"Shoot all of the bullets in the gun's chambers to inflict devastating damage onto an enemy. This skill has a small chance of causing Blind status to the caster. Consumes up to 10 bullets per use."
Also, according to iROwiki, there is actually a 20% chance to blind at level 10. Maybe it's hardcoded differently than the skill says it is. That's all I can suggest about this one.