Not exactly a cast bullet post, but... A couple days ago I was reloading a good sized batch of 45 ACP with range pick-up brass. During the loading session for reasons unclear one case came out from under my Dillon powder drop with an insanely large belled case mouth. What the heck? Seated a bullet and it would go way, way down in there. I wondered to myself, how could everything suddenly have gotten so far out of adjustment? Well of course it wasn't an adjustment thing, but rather a rouge case. Star brass bearing ROWLAND 460.
Never heard of it until I did some googling. I doubt I'll ever see another one which is fine with me. Small vs large primers are enough of a headache without having to watch for 1/16" longer cases. Sheesh...