Why are hollow point rounds so accurate?

Answer 1

They are not "so accurate". Standard pointed rounds are more accurate. Hollowpoints are used because they flatten on impact and this cause a lot of damage to the victim, but tend not to penetrate walls, etc., thus fewer injuries to bystanders.

Edit: What the person wrote above me is incorect. Although hollow points in bullets can be utilized so that "mushrooming" (A bullet expanding in its terminal state) it can also be used for accuracy. A HPBT (Hollow point boat tail) Is a type of bullet. This is known as a spitzer type bullet. It is used in rifles because it changes the location of the center of gravity helping the bullet stay stable in the flight pattern.

Backing up my facts:The Geneva Convention BANNED Hollow points from being used because they deemed them inhumane. It stated hollowpoints are made so they expand and cause unessesary suffering. Rifle bullets (HPBT spitzer type) use to counter attack terrorist snipers are the exception to the rule because the hollow point isn't designed to aid in mushrooming, in fact it doesnt even HELP mushrooming that much. The bullets are hollow point to aid in accuracy as noted earlier :D

EDIT: Hollow points are NOT banned by the Geneva Conventions. They are banned from warfare by the Hague Convention. The Geneva Conventions do not discuss hollow points.

Yes, hollow point bullets can be more accurate than non-hollow points, primarily in rifles, because the hollow moves the center of gravity slightly to the rear. Such bullets are often called Open Tip Match (OTM) to differentiate them.