I have several cordless drills but I prefer to use my drill press. Much faster and more consistent because the cutter always has to move straight down, there is no chance of me changing the angle.
I just leave the drill running, lock a case in, pull the handle till it hits the stop, let got of the handle and replace the case with the next one.
I keep a case of each cartridge I load to set the depth on the drill press so set-up is quick. You just need to align the case holder with the cutter and away you go.