I've more large rifle, and large and small pistol primers to meet my shooting demands for many years to come. The .223 is my first and only rifle that requires small primers, so never had any stash saved up. Bought the rifle and a brick of primers two months before state was put on house arrest and the only local and full-service gun store was forced to close. There is a California chain gun and fishing store located 20-miles away, but it doesn't stock primers, and neither does the nearby national chain, Big-5. I have to rely on Powder Valley, but their availability has been very spotty and I'm not about to pay $75 to $100 per brick.
So, in a sense, trying to find an accuracy load with a partial bottle of powder that has never lived up to expectations with any cartridge, bullet or rifle combination that it's been loaded for, in the hope that just one more attempt will result in a 100-yard, five-shot bug hole, is a waste of primers that could have been used to assemble a proven accuracy load. That said, it was still a fun and enjoyable session.
Yep, even load experiments or shooting sessions that don't produce the desired results are still successful experiments or sessions, because you learn what doesn't work, or pulling the trigger that resulted in a less than stellar group was still fun.