Today i went to reload 15 rounds that i fired last night and after resizing i noticed my case trimmer wouldn't fit in the necks of 12 of them /ubbthreads/images/graemlins/confused.gif , I tryed resizing them again but it made no diffrence. Then thinking something had gone wrong with my die i cleaned it out and tryed again with no success. Finally i tryed depriming/resizing some winchester brass and my cutter fit fine. So if it's not the die or the cutter it must be the cases. But then my expander ball should pull the neck open on the up stroke regardless, yes? I'm confused. What could be causing this and how do i fix it? I can't give measurements because i still haven't brought a caliper /ubbthreads/images/graemlins/blush.gif . As a side note the 3x 5-shot groups i shot last night averaged 6.6mm for 3 shots and 16mm for 5 shots. Not bad at all for a factory standard M10FP /ubbthreads/images/graemlins/grin.gif .