33-36 is pretty standard for framing, by the time you top it, it gets higher. My personal suggestion for a reloading bench, and yes i do it, and yes it looks trashy... Go to a junkyard, and get some seats from a luxury car, or the rear row from a minivan or suburban, frame that to a comfortable height, and build a bench to match the height.
Car furniture is much more durable, and usually more comfortable, especially if your sitting a while. It also is much more upright, and weighs less, and therefore easy to move out of the way than traditional comfortable Charis.
I have a bench approximately 35" and a chair about 20", and this allows me to comfortably run a loadmaster, looking into each case before seating a bullet, and to run a Lee 4 hole for about two hours comfortably.