I've never had any luck trying to get any kind of 'decent' DOC on my mill even with using a .003" chip per tooth. (I use mm, convert to inch, then convert back). I'm limited to 3000rpm max and trying to go 1/2 tool diameter DOC does not work. The amount of bits I've broke is stupid.
I don't go for carbide due to the machines rpm limit, they're too brittle to even lightly hog so now using cobalt instead. I have flood.
If I use a 6mm bit for instance, go 3mm DOC, 0.003" load, it goes bang. If I then go, 1.1mm DOC I can easily go 0.004" load and likely even more. The time difference between the 2 according to simulation is minimal. This is under slotting with a 3 flute.
It's a new build so still playing around atm.
When doing a pocket, if I stick to the 1.1mm depth per 360 degree cycle by adjusting the ramping degrees. I can ramp smooth profile straight down the center then expand the pocket as needed at 0.4mm stepover all at the same 0.004" load with a 0.2mm slower finish.
It's all trial and error to me, every machine is different. I'm still cluless
With an 8mm bit I've only tried 1.2mm DOC so far at the same 0.004" load.