I did the same back before Slick Willy moved into the White House. (I wonder whether they will change the name of the White House to something less racists?) I was not loading or shooting quite as much then as I am now and would not keep many components on hand. That would cause me to run out of one or another component at times. Cases, bullets, and powder are not much good without primers. I decided a loaded round had all the components already assembled, and those components would always be usable. I started loading up about every case I had on hand. It snowballed. I do have lots of components that have not yet been assembled because I have not had the time but also have a whole bunch of complete rounds for the chamberings I shoot most often and a pretty good supply of rounds for all the other firearms. I do not want to be without ammo for any firearm I have. I do not think the burnable components will go bad any faster in loaded rounds than they will in their original containers.