I broke my G27 in with several hundred rounds of the Winchester and Federal 180gr FMJ's from Wal-Mart. For some reason .40 isn't as popular in this area so those are usually in stock. I then moved to the Remington UMC 180gr JHP's.
I now currently carry Winchester 165gr PDX1 bonded JHP and they have been very accurate if a little punchy. I picked up some 180gr of the same tonight that I will shoot this weekend to see which I like better. I want some Speer Gold Dots but almost nobody carries them here and the ones that do just never have them. I will probably have to order them online.