I have been reloading 243 for nearly 5 decades and had never had this problem until last year reloading for a Howa 1500 that my wife shoots. I just couldn't get the dies to resize quite enough to close the bolt cleanly. Unfortunately mine were Redding dies of which I am a big fan, got out a set of RCBS that I had and everything is ok. Just seems weird that you ran into the same issue.