how do most of you keep track of your load info? do you write on each box powder, primer, projectile, oal, and so on. or do you keep it in a log and and just correspond your boxes with the log? seems a little redundant to write all that info on each box so i thought about just numbering the loads in my log and writing that number on each box with the corresponding loads.

I have manila folders made up for every rifle I have, and record load data in each one. I keep a log at the range when load testing, then put those notes in the manila folder when I get home. I record info on every load at the range, good and bad, so I can keep track of loads that work, and those that don't.
I keep no info on the computer about any of my guns. Too many people have access to my hard drive, and I want NO one to know what I have.

Data book from office supply.
Duplicate info on boxes written on adhesive tape. Full load info with how many times fired, trim info, etc.

I do both a log book like a 4x6 that does not leave my loading room and the midway label that I buy in a roll.

I use a loose leaf notebook, one for rifles, one for handguns.