Time for some real bullets test rather than with 6mm plastic pellets as Tactical Rifleman puts up a video comparing the 300 Blackout to the 9mm in this ballistic gel test... "While I was at the NRA Convention, I was asked why many military units were trading in their 9mm MP5SDs and going to 300 Blackout.  While I can neither confirm or deny what different units are doing or why they are doing it, I can share some of my personal thoughts."

Read more here.