I de-primed a lot of mixed brass the other night and found that
the Remington and Winchesters pockets were a little dirtier
than the other cases......... the inside of the case was ok, though.

The Federal cases were cleaner in both the primer pocket and
the inside of the case but there was no way of telling if the quality primer was used.

Note;
The Tulammo case took a lot more pressure to get into my die
for some odd reason........ ( brass )

later.