Quote Originally Posted by aprayinbear View Post
One more thought,

I showed the brass to the guy at a local gunshop and he instantly suggested that the headspace might be too large and said it probably wasn't safe to fire the gun until a gunsmith checks it out. Does that make sense?
Head space problems rarely cause this type of neck split. As I said, anneal your case necks at reloading # 2 or 3 and the problem will stop.