Out of curiosity.....how many times can you resize the 10mm brass?
Not 10mm S&B?
I have some S&B .45acp brass that's been resized a couple dozen times before I stopped keeping track.
Out of curiosity, what's the ID and OD in per ratio in direct comparison between the two in shell thickness at what point?.
TBS, Sorry didn't mean to make you think about whale thickness of each at every point that gives its structural integrative at certain points of pressures?
Try to take a 9mm Luger (.355") and put it in a .357 (.357") revolver chamber.