Safearm, I agree with you when you stated that the adoption of the 40 S&W was coincidence. It doesn't make sense that one particular 9mm load would be the movitvation to change calibers AND all the guns in the department. Other factors had to have been present.

I keep seeing Ayoob's comments from 2000 being used against the 147 grain 9mm loads. Those comments are 10 years old. Too much has happened with bullet design in that decade of time for me to believe those opinions to still be accurate. I can't speak for Mr. Ayoob - maybe he will chime in for himself. I do know that many departments are using the latest 147 grain HP 9mm loads with very good results.