I make and sell range boxes out of 3/4" pine with removeable, and sliding trays. The "inside finished" measurements are; 7" top to bottom x 9 1/2" front to back x 22" side to side. Sanded and stained with walnut danish oil.
Two hinges, hasp for padlock, two buckle type latches, and
heavy wood center top carrying handle. I also made smaller
ones with these same features.
The key to making a good range box is accessibility and
storage of your shooting supplies. I normally charge $45.00
to $75.00 dollars per box. I've sold nine to date.
I would post some pictures but I don't have that capability,
sorry. Designing and building your own range box is not a
bad idea. You get what you require this way, and it's a
good project. :thumbsup: