With the price of ammo through the roof I don't think I would do high volume practice with self defense ammo. For practice I really like the Federal Champion ammo at Wal-Mart. It feeds flawlessly and I have yet to have a problem with it.
I also like the Winchester white box, its packed just a little hotter than the federal, so it is probably more closely matching the self defense stuff.
For the SD, I like Speer gold dot JHP's