Glad to see that Corbon is finally seeing the light in the 380 cal. I've been carrying their Safety-Slug in my P3AT. They feed really well due to that plastic ball they have on the tip. I would tend to think that their Powerball would feed better than their Safety-Slugs. Not quite sure if the Safety-Slug has the polymere caps, but they do leave a very big hole with all those BB's bouncing around.
I've tried the Golden Sables and I also had no problems with those either. Then again it's what feeds reliably and does the most damage to the BG.
I now carry the Corbon 150 or 155's (can't really remember) in my P40. I wanted the Powerballs, but the dealer I was at don't carry them. I guess that you have to get them strictly on-line.
As far as the stats go, I'd chose the Corbon's any day over the other brands simply because all they make are defensive loads and they seem to have their she-ott together.
Let's see 3 boxs of Powerballs, 1 for my 45, 1 for the 40 and 1 for the 380. I guess it's Busch beer instead of Bud...