This is why I chose the Fiveseven. Lots of ammo per mag. When I carry 1 round in the chamber, 1 mag in the gun, and 2 spare mags...I have 61 rounds at my disposal.
Then consider that 1 mag is Leo/Military ammo and 1 mag is high power aftermarket stuff...I have 40 rounds that should clear kevlar. If trends continue we will see more and more bad guys wearing kevlar making this more and more what you will need to stop them.