QuickLOAD has updates from time to time to add powders and bullets, but they are often a couple of years apart, so the database doesn't automatically stay current. But as Rimfire5 pointed out, adding a new bullet is pretty trivial. He only forgot to mention that when you have slected the bullet that is the next closest one, you click on the icon that shows a bullet with some caliper jaws applied to it. That brings up the file modifying menu.
I recommend you make a separate bullet file for all the bullets you enter yourself. That way, when there is an upgrade that data won't disappear.