Record/inventory keeping

I use a spreadsheet in my google drive. I can edit it from any computer I login to, or my phone. Makes looking things up on the fly easy.

It is synced to my personal computer nightly.

Don’t suppose you have a blank template you wouldn’t mind sharing

I use google docs, in 2 line format
452. 5.56X45 NATO Hybrid . .| . 453. 5.45X39 Russian
and so forth.

Depends where you are. Here it is a legal requirement to maintain accurate records of each round and the date on which it was purchased/sold and from/to whom.