Ok, I'll chime in here. Please take this with a grain of salt.
Today I went out to see what round I was going to carry in my Kimber with the 3 in barrel. The gun has been broken in and has proved reliable with the following ammo:GS 230 gr., Win. Ranger 230 gr., Hornady Personal Defense 230 gr. +P, Corbon PowerBall and DPX . I soaked phonebooks 24 hrs and off to the range I went. This is what I found....
1) The DPX performed as advertised. Expansion was perfect with all rounds tried. It also penetrated very well.
2) Golden Sabers came is second. Good expansion and penetration, one lost its jacket and one had so so expansion.
3) Ranger 230 gr. slight expansion, good penetration, one failed to expand at all.
4) PowerBall lost jackets on all but one, but that one expanded very well. Penetration was average.
5) Hornady 230 gr. performed to worst. Little to no expansion.
Remember, this was phone books so take it for what it is worth.