Results so far
Some of the posts were a little vague but I did the best I could. The corresponding numeral indicates the number of members who wrote a post indicating what they carried as their 9mm defense ammo.
Here is what we have at this point:
Speer Gold Dots 124gr +P, 13
Hornady Critical Defense, 11
Federal 9BPLE 115gr +P+, 8
Winchester Ranger 127gr +P+, 8
Federal HST 124gr +P, 6
Federal HST 147gr, 4
Winchester Ranger 147gr, 4
Remington Golden Saber 124gr +P, 2
Remington Golden Saber 147gr, 2
Winchester PDX1 147gr +P, 2
Corbon DPX 115gr +P, 1
Corbon DPX 125gr, 1
Speer Gold Dots 147gr, 1
Georgia Arms 115gr, 1
Federal Hydrashok 124gr, 1
Winchester Ranger 115gr +P+, 1
Winchester Ranger 124gr +P, 1
Remington UMC 124gr, 1
Magtech 124gr, 1
Winchester 124gr Bonded +P, 1
Canadian 120gr FMJ ("blunt tip"), 1
Highland 115gr HX, 1
THIS LIST WILL BE UPDATED AS SUBSEQUENT ENTRIES ARE NOTED.