Too Many to Remember...
I have at the moment 14 die sets for rifle calibers, and looking at the bullet boxes on the shelf, there are 46 different bullets for those 14 dies. -Not to mention 17 different powders! Wa-a-y too much for this old brain! So I keep both a log book and box labels, and refer to both before I load anything! I often also look at one or more manuals, because i do a lot of "tuning and tweaking" of loads, and use the manuals for min/max powder, COAL, and primer/powder combinations.
I picked up reloading again 3 years ago, after a 15 year break, and the newer powders have changed enough that my old "pet" load combinations no longer perform as they did when I worked them up back in the '80s and '90s. It's made for a lot of fun range time, and some new discoveries. My .257 bob no longer likes H380 with his 115gr. Partitions, but he drives tacks using 8208XBR! And the M&P 15 has different "likes" than the old mini 14, and so on...
If I didn't have my log book, I'd surely find a new pet load, and promptly lose track of it again! And the bullet box labels are indispensable for keeping track of what works well, while shooting it.