no claim to being the first to think of this - but in case someone else is as slow as me -
I like to keep my shells in boxes (ignore what my lovely wife says when they come rolling out from under the seat in the truck) - I find it easier to grab what I want when I am heading out and to know what I have on the shelf.
but now between supply issues and NY's ban on internet orders, I am reloading more of my light loads - and I found I had not saved enough boxes for 2 1/2 inch shells.
so- with a beat up box as a pattern, a scrap of thin plywood and a couple minutes on the bandsaw, all I needed was some heavy paper or light cardboard and I have all I need, just trace it and cut with an exacto knife or good scissors. the lines are to remind me where the folds are supposed to be.
the pattern and a homemade box.
I'll make a pattern for the 2 7/8 10s as well