I have changed carry ammo a couple of times since the last time I did any testing. I have been carrying either Cor-Bon Pow'R Ball or DPX. I decided to see which of the two performed better. For my test medium, I used a shoebox packed with soft dirt filtered of any obstructions. The first thing I noticed was the shock of the Pow'R Ball blew the top off the box and the DPX did not. I got about 6 inches of penetration from the Pow'R Ball which expanded decently. The polymer ball was still sitting in the cavity when i recovered the bullet. The DPX penetrated much deeper, about 8 - 9 inches, but did not expand. Here is a pic, Pow'R Ball on the left and DPX on the right. I believe I will carry the DPX since it gets better penetration and if it does expand, all the better. Hope this helps some of you in your carry decisions.