I just bought about 10 boxes of Remington Ultimate HD BJHP's, because for some reason, when I bought the first two boxes, they rang up $12.99 ea., so I paid for them and went back and got another 8 boxes. I've used them in my P-11 and they have worked really great for me.
I've always enjoyed how Cor-Bon shoots and reacts to a target. It's a bit pricey compared to your average wal-mart ammo, but you can't really put a price on your family's safety IMO.
As others have said, buy a few different types and test them out. Whichever you are most comfortable with should be your carry ammo. Just remember to practice with the same ammo you carry as all of it will fly differently.