I'm with some of the other guys on the three ring binders. I use targets from either the 6mm br site:

https://www.6mmbr.com/targets.html

or beartooth bullets:

http://www.beartoothbullets.com/misc/targets.htm

I keep the load info with the target in three ring binders by cartridge and then page dividers in it by bullet maker. I can access most loads I've worked with fairly quickly.