I use the Lee lock stud and cutter in a cordless drill. I tend to do the final trimming in two stages and get brass that is within 0.001 of the goal. I am so use the RCBS neck trimmer right afterwards and avoid changing the holder.

After the first 30, I had it down to a science.

Not planning on doing this much more, but it's nice to have an extra hundred or so for plinking and sighting in.