And now they're moving to 9mm, which 3 of the agents in the Miami shootout were armed with, but certainly not the more effective loadings that the FBI in part u

And now they're moving to 9mm, which 3 of the agents in the Miami shootout were armed with, but certainly not the more effective loadings that the FBI in part uses to justify this move. See https://news.ycombinator.com/edit?id=10716811 https://news.ycombinator.com/edit?id=10716811 in this discussion for a few more TL;DR details gleaned from the Wikipedia article.