Go to any large local shoot, or rendezvous, and check out the boxes. They are most often individually designed and made.
I have a large compartment in the bottom to put cans of powder, bullets, and extra "stuff". I installed some wooden rails on the sides to hold a Tray on the top part of the box. I put a lot of tools, spare parts, extra flints, nipples, etc. in the tray- stuff I need to use more frequently than the stuff down below. My range box was made from a Winchester Ammo Box. The wood box has a new bottom, and a thick Walnut Lid, a handle in the middle, and brass plated corners install. I also have skids install on the bottom to keep the box off wet surfaces. All the hardware was purchased from a local hardware store. I have a piano hinge, and a normal clasp with provision for a padlock on it for security during travels. I have an engraved brass nameplate with my full name on it riveted to the top of the box. I bought the plate from one of those shopping mall Kiosk places.
No attempt was made to make this box Period Correct. If you want to use ropes for handles and find old forged iron hinges, and hasps, knock yourself out! I have no intention of hauling my range box out to rendezvous to park in my Tipi. It can stay in the truck/car, while I load, and shoot from my hunting bag.
About the only thing different I have seen in other range boxes are different designs and arrangement of compartments in the top tray, and occasionally a divided area in the bottom of the box to put a specific item. I didn't put in dividers as they just take up needed space for more " Stuff"! :rotf: I have also seen boxes made for a specific gun, only. The owners have different range boxes for different events, particularly those who mainly shoot targets.
I saw an interesting set up in a range box used by a man shooting Trap with a custom made shotgun. His top "shelf" was deeper than mine, and he had dividers to separate his various wads and cards, along with cleaning patches, shot, and caps.
I also have seen very specialized boxes used by the Slug Gun shooters to hold their long bullets, powder, and primers, so that the shooter can get them easily, while keeping track of how many shots he has fired at a given target.
So, this is something that will require Personal judgment on your part. No one else's box is going to be made exactly the way you want it. Your first box won't be as good as the future ones you build. You will alter the shape and size of compartments in your box to fit your needs.
Pictures of my box would be meaningless to you, and probably vice versa. I have seen men use fishing tackle boxes for their BP needs to good advantage. Its not my cup of tea, but I can't fault them on their choice. It works for them. :thumbsup: