This comes down to personal preference, there are a few that you could try out and see which ones get the best groupings for you like; Corbon Self Defense, Federal Premium Personal Defense HST, Hornady Critical Defense, or Federal Premium Guard Dog. Corbon being my first choice. If you can find it the G2 Research RIP 9MM 96 Grain Hollow Point is the ultimate death round, but it costs about $44.00 for 20 round box. AmmoZone is one place that I know of that is a distributor.