Really no such thing as "knock down" power. If you scrolled down to the chart, you'd have notice that no one round drastically out performed the other. And that test was done by Speer, they make money marketing all of those rounds.

That being said, carry what you like and shoot well. But they have no reason to "lie" and show relative equal performance of their major pistol caliber rounds. I would however, like to see the same test performed shooting through heavy denim and some other real world barriers.

SoCal, do you have any data on the Winchester 147 you are issued? I'm interested in that round and maybe their 127+p as well.