Thought this might interest some of you.
www.realguns.com/articles/766.htm
The bullet's light weight, coupled with high velocity, results in high forward and lateral energy transfer for increased lethality. Reduced bullet weight results in reduced recoil which makes it easier to remain on target when multiple shots are fired.
Chickenhawk wrote:
Expansion looks pretty much like a regular hollow point expanding too.
Ball ammo penetrated well beyond the others as it did not expand to increase its frontal area for increased drag. It also demonstrated no measureable signs of lateral energy transfer. Unfortunately, there are many autoloaders that require the rounded ogive of ball ammo to feed properly, reliably. Fortunately, the ARX bullet has a very similar contour and feeds as slick as ball ammo, so owners of these types of autoloaders are no longer stuck with low shock ball ammo as a sole choice.