Well, I have time to kill and it's going to be a crappy cold weekend anyway so I'm going to inventory mine, just for fun (I know probably not most people's idea of fun but I'm kind of a data geek.)

One thing I definitely think an inventory will help with is finding a specific caliber. I keep most of my ammo in .50 USGI ammo cans. The problem is, I have several and Murphy's Law says that whenever I want a specific caliber like .30-06, I have to open several cans to find the rounds I want. So part of my inventory process will be assigning a number to each box and then including in the spreadsheet the location, so if I want a specific round, I'll know which box to go to.