IT begs the question (other than the chick factor) why did the FBI revert to the nine? Personally, I'd go with the 357 SIG over any other caliber for self defense.
They explained it pretty well.
Have you not read it?
Although I am not stepping into the debate I thought it would be interesting to read, here is one of a few links.
http://looserounds.com/2014/09/21/fbi-9mm-justification-fbi-training-division/Related article.
http://looserounds.com/2014/02/02/dutydefense-carry-ammunition-selection/The Rounds listed bellow in 9mm, .40 Cal and 45 ACP, have been tested extensively and/or meet your carry standard.
9mm
Barnes XPB 115gr HP (35515) such as loaded by Cor-Bon (DPX09115)
Winchester Partition Gold 124gr JHP (RA91P)
Winchester PDX1 124 gr +P JHP (S9MMPDB)
Winchester PDX1 147 gr JHP (S9MMPDB1)
Winchester Ranger-T 124 gr +P JHP (RA9124TP)
Winchester Ranger Bonded 124 gr +P JHP (RA9BA)
Winchester Ranger-T 127gr JHP +P+ (RA9TA)
Winchester Ranger-T 147gr JHP (RA9T)
Winchester Bonded 147gr JHP (RA9B/Q4364)
Speer Gold Dor 124gr JHP
Speer Gold Dot 124gr JHP +P (53617)
Speer Gold Dot 147gr JHP (53619)
Remington Golden Saber 124 gr +P JHP bonded (GSB9MMD)
Remington Golden Saber 147gr JHP (GS9MMC)
Federal Tactical 124gr JHP (LE9T1)
Federal Tactical 135gr JHP +P (LE9T5)
Federal HST 147gr JHP (P9HST2)
Federal HST 124gr JHP +P (P9HST3)
.40 S&W
Barnes all-copper bullets (140 & 155gr) loaded by: Cor-Bon (DPX40140)
Winchester Partition Gold 165gr JHP (RA401P)
Winchester PDX1 165 gr JHP (S40SWPDB)
Winchester PDX1 160 gr JHP (S40SWPDB1)
Winchester Ranger 165gr JHP (RA40TA)
Winchester Ranger 180gr JHP (RA40T)
Winchester Bonded 180gr JHP (Q4355)
Speer Gold Dot 155gr JHP (53961)
Speer Gold Dot 180gr JHP (53962)
Federal Tactical 165gr JHP (LE40T3)
Federal Tactical 180gr JHP (LE40T1)
Federal HST 180gr JHP (P40HST1)
Remington Golden Saber 180 gr JHP (GS40SWB)
.45ACP
Barnes XPB/TAC-XP 185gr HP loaded by:
Cor-Bon (DPX45185)
Taurus (TCB45ACP185HP)
Winchester PDX1 230 gr JHP (S45SWPDb)
Winchester Ranger-T 230gr JHP (RA45T)
Winchester Ranger-T 230gr JHP +P (RA45TP)
Federal Tactical 230gr JHP (LE45T1)
Federal HST 230gr +P JHP (P45HST1)
Federal HST 230gr JHP (P45HST2)
Speer Gold Dot 230gr JHP (23966)
Speer Gold Dot 230gr +P JHP (53969)
