"Write it down, or it did not happen."
Keep a log when doing load development.
When you have a load you like, write it all( components used, date, time, velocity, SD, ES, group size, the shirt you wore that day, everything) down AGAIN, someplace that will not get misplaced.
A lost log book is a Very Bad Thing.
TheGolden Rule of Tool Use: "If you don't know what you are doing, DON'T."