I am in the process of rebuilding my loading area and moving it to the basement. I was previously in an alcove on the second floor, but I work weird hours and my wife becomes perturbed when I try to reload at 0200.
I just completed my bench (Third Generation) and it is 30" high x24 inches deep x70 inches long. I am using a system of step plugs(masonite on 3/4 inch plywood-the masonite cut with 2 3/4" hole saw and the plywood with a 2 1/2" hole saw) that are replaceable in the bench top to fasten down my presses and such which are mounted on various sized blocks 2x4", 2x6" etc. I even have a small band saw and drill press mounted on blocks. The holes allow 4 point mounting with 4" C clamps in various positions on the bench. If I just need a flat surface for disassembling a fire arm, I replace the plugs and the small parts don't fall through.
Here is the bench with the plugs in place. In the background to the left is my "Gen II" bench which is taller and wider (about 40" tall x 30 " deep) and which is more suitable for heavy work such as resizing cases which I do standing.
Here is a shot of the underside of my "Gen II" bench (the Gen III is similar but lighter construction) . I find that cheap 2x4"s joined along one edge with glue and screws for the legs is much easier to work with for this construction, is probably stronger, and has a bigger foot print on the floor than a 4x4". I also am a strong proponent of triangular braces for rigid construction. The 3/4" plywood and 3/16"masonite top is over hanging the frame by 1 1/2" (the width of a 2x4"). this gives good purchase for the C clamps.
Here is the bench with some Lee Equipment mounted- the powder measure is mounted on a short piece of 2x4" and the press is on a piece of 2x6"
You can see the plugs here on the right
I still have to do the shelves and storage area and add some electrical circuits for better lighting and power.
Regards, DocAitch