I put this together and forgot to share it. It has boons at the top, bullets, and batteries at the bottom.
In ammo, I'll put a slash every x rounds depending on the size of the clip. Ex. for the Tactical Pistol, I'll put a slash every 9 boxes to keep track of when I have to reload. Each section has 50.
In batteries, there are 100 charges each separated into groups of 10.
For 20 capacity I use the OOOOOOOOOO/
OOOOOOOOOO/
For 40 capacity I use the OOOOOOOOOO/OOOOOOOOOO/
OOOOOOOOOO/OOOOOOOOOO/
and so on...