Biggest problem with stored reloads is the corrosion effect between the dissimilar metals of the case neck and bullet jacket.
I haven't encountered this, but I have experienced in a wide variety of calibers splits in the neck. I'm not talking about normal firing neck splits, I am talking about cracks you may not even be able to see until your fire the round. This is why the military requires visible heat treating (annealing) of the necks for longer term storage.
I have never had a case loaded with lead bullets split, but 222, 223, 30 Carbine, 32 H&R Mag (factory & loaded new brass), 41 and 44 Mag have all split with longer term storage.