I searched the forum but did not find a thread discussing these dies. RCB X-Dies are supposed to minimize the need to trim brass. But the instructions says you have to trim the cases anyways... The instructions are as follow:
so does that mean that the first round requires one to prep that brass normally (resize + trim) and then put them through the X-Die. Afterwards, these cases no longer need to be trimmed when they are resized using X-Dies? If so, i guess that means one has to keep track of what brass as been where...
All cases must be sized and trimmed to the same overall length. For the
best results, full-length resize each case and trim to .020” under maximum
case length. This is a “one-time only” preparation of any and all cases to
be used in the X-Sizer die (RCB).
best results, full-length resize each case and trim to .020” under maximum
case length. This is a “one-time only” preparation of any and all cases to
be used in the X-Sizer die (RCB).

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