Just so you know, I checked the first couple of fire rate values and sorry to tell you but they were all wrong without exception, so might be worth taking them down again until the devs get you correct values.
I first thought so as well, but now I'm thinking the firerate is shown as e.g. 0.25 for Monarch = 0.25 seconds per shot as in 4 shots per second instead of 0.25 shots per second. Did some quick test with Monarch and Talionis for this, but no one take this for granted.
By the way, does anyone happen to know whether the damage listed is for one projectile or total for all projectiles fired once per turret? This is mainly for those weapons that fire multiple times per click.