Sure do. I have too much other stuff running through my head to remember everything. I keep everything in Excel. I note everything as well that way I can sort them to find what I'm looking for.

For instance, say I want to see if a particual bullet shot well. Just sort it by that bullet and it will show the groups I've shot with it and with which gun. I also keep my targets as well which are numbered and scanned. Then entered into Excel for a visual if I need one.

Coming from a Business Analyst position my brain works best this way. A friend of mine just uses a notebook and that works great for him.