I have a thread on Reloading about my 250 Savage where I used a $500 CADD package to create the inside Label for a 50rnd MTM box. I figured I could do it with an off-the-shelf sw package instead.

I have Open Office instead of Win/Office but it's the same thing.

Open a new spreadsheet.
drag the column width to .55"
Drag the row height to .75"

You can use the "Borders" tool to outline the three rows = caliber (top row), powder(variable boxes) and charge(10 boxes).

You can vary the font size for powder,caliber and charge or do like the last example which is a blank form for hand writing the info.