Do we all agree that if you trim (any) case, you first need to size, and then only trim ? One time I forgot to size .357 cases and started trimming, and almost non of them were over the max size. After realizing this after a dozen of cases, I stopped triming, sized the dies, and re-trimmed. Many cases were then over max length.

I also seem to notice once-fired brass would be relatively often over the max (for .357, not 9mm), but in the following reloads not anymore. In other words, after the first firing's increase, they did not stretch much more in the following usage/reloads.

Is that right ?

B686