User blog comment:BeastMan14/Season Finale! Time for a laugh: The Blood Gulch Squads vs Nazi Zombie Teams!/@comment-4552610-20130423223510/@comment-6771148-20130430025305

Undead has point. It not necessarily the caliber of the bullet that determines how powerful the shot is. If .50 cal round is shot for more advanced weapon it deals more damage. More advanced guns deal more damage by apply more  Velocity per shot