Nickle brass and brass colored brass only get you two loadings with this route...
I have used sharpies from day one too...
But only for developing loads in same box, ring the primer, color in the primer, half a primer colored...
Once a load is established, I buy different colored boxes for different firearms. Today there are atleast 4-5 colors for the popular sized boxes.
THEN I use hang tags on the trigger guards of the firearms filled with useful information like, last time shot, cleaned, distances as well as loading numbers. (All my re-loads get a number.) Thanks to the "smart phone" (with GEO tracking off!!!) I take pictures as well. Everything is recorded in my loading log too.
One day I'll get everything on the computer as well...
CW