So, apparently the only way to fire more than once from a swarm turret is to leave the turret and re-enter it. Lame!

Hey! that's a cool cheatso trick. they have a refire rate of 1 per minute or so if you reenter you can fire immediately.

I believe it's once per 30 seconds, normally.

There really needs to be a nice graphic on the turret selection pane to show where each turret is and what it shoots. A graphic when you are in the turret would be nice too...