I use a three ring binder with a tab section for each gun/caliber. I number the information using caliber/letter, so my first 22 caliber rifle is 22A, the second is 22b, and so on. I then mark the case lots for that gun as 22A1, 22A2, etc. In each section, I have a page where I list the basic info for the gun, serial number, type of sights or scope, shell holder numbers, trim length, where I bought it.
I have a "pet loads" page, where I record the 'best' loads. I have a page for each lot of cases, where I track how many time they've been fired, with a list of all the reloading operations I do so I can check them off as I complete steps, ending with a 'ready to reload' date. Finally, I have a shooting log similar to the MTM ones, listing number of rounds, distance, group size, and loading info. Each line is numbered, so I can refer back to 'pet loads'. Each type of page is color coded, and then numbered using the 22A1, 22A2 format. So, an entry in the logbook on line 12 would be 22A1-12.
I don't save a whole lot of targets, and the binder is a 3" and still has plenty of room.
When I'm ready to load, I can go to the binder, look up my cases, see what's ready to go, reference the right shellholder, and start reloading. Despite how it sounds, it isn't that hard. And no, I can't tell you it was the third shot of a five shot string that was the flyer in a group I shot back in 1998, but I know enough.