I've only bothered using on RK500 and RK1000.
Made a macro which shoots the drone down to 9%, then it gives me infinite ammo, then it shoots until 00:00. It then drops, my char picks it up, shoots new drone, repeats. All in one macro.
If it is not working for some of you, get your framerate up to around 50+
If you framerate is too low then it sometimes does not work. Built into my macros are sometimes movements to look in a direction when the framerate goes back to 90.
Have fun.