I've fired the same case for the last 5 years but then I breech seat. Its marked on the base so it goes into the chamber the same each time. The indexing of the bullets is accomplished by aligning a mark on the bullet with a mark on the breech seater. Its probably anal but on the other hand I'm on the lookout for an old bottle of sperm whale oil to concoct some of the old forgotten lubes. Probably won't work any better than something new but its something to talk about at the range.