I haven't had any problems with split cases, but have a bunch of brass, and the most any have been loaded is 2-3 times.
Some of the early cases used in factory ammo had "shallow" primer pockets, only discovered when somebody tried to reload them and standard small-rifle primers wouldn't seat deeply enough. The pockets weren't just slightly shallow, but a LOT, with only about 3/4 of the primer entering the pocket.
I never encountered this in any of the factory ammo I shot, or in unfired brass, but did run into some after purchasing a batch of once-fired cases off the Campfire Classifieds. About 2/3 had shallow pockets so I "uniformed" them, and they work fine.
What I've since wondered, however, is where Hornady got primers to fit those shallow pockets?
