Trimming
Auto cases don't need trimming. Revolver cases should be trimmed if they aren't the same length. Rifle cases should be trimmed to the same length and then resized in RCBS X dies if your caliber is available. After resizing in the X die you should champher and deburr.
I use a X die for my Savage 10FP reloads and along with a Redding Comp. Seat die I get 3/4' 10 round groups.
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