User blog comment:Emptylord/Sandbox/Custom Patch Notes/@comment-1330314-20130816162840/@comment-3974211-20130816164637

Caitlyn doesn't critically strike - she just deals bonus damage equal to 50% of her attack damage. The in-game tooltip might be out-dated, but I thought they updated it a while ago to just say "bonus damage".

That Cannon Barrage might be more thematically fitting, but targeting with it would be ungodly.