Pretty sure all the guys toting those around are using the optimized rounds.

Also, here's a chronograph test using 10.3" and 11.5" barrels: https://www.youtube.com/watch?v=6hR1pzZGxcs

And here's some interesting data on handgun rounds in self-defense situations. Typically, the attacker stopped attacking once they were shot once regardless of what they were shot with.

http://www.activeresponsetraining.net/an-alternate-look-at-handgun-stopping-power

Pretty sure all the guys toting those around are using the optimized rounds.