Re: Dies Oversizing brass
Primers can't 'back out' unless the shoulders are set back too far. It isn't dies, as such, that set shoulders back too far, it's the users; those things do screw back up a tad.
Primers that set back and don't get reseated when fired are far below normal chamber pressure. If you load them to normal pressure your set back primers would be as flattened as a pancake, making most reloaders yell "excessive pressure" when the only problem is a sloppy chamber fit because of jamming the poor cases as far into the sizer die as they can go,
Reload your slightly overly resized cases and shoot them. Your real question is, what are you going to do with an extra set of .30-06 dies?