I find that hard to believe, based on the Gel Tests. If you compare them in Gel, the CD does not penetrate as much as the standard 110 JSP, expending more energy, sooner. If he is basing it on a single instance, it could be anything from shot placement, organ hit, bones struck, etc. I know there was a review comparing the two, but it was from a pistol, and the CD wasn't as good as from a rifle.