jcwit
member
I uniform for (what else?) drumroll please..... SLAMFIRE prevention.
(And I have noted the need w/ all but Lapua brass)
As long as the primers seat 2/3 thousands below flush, there's your slamfire prevention. At times I do "uniform" the primer pockets just as I ream/uniform the flash hole for brass when I wish the utmost in accuracy, I also may turn the necks to uniform them also.