I have a Dillon trimmer set up on my 650 with casefeeder and case prep toolheads with trim dies for 30-06, .308, .223/5.56, and even 30 Carbine (special thin toolhead and CH4 trim die). That was I set the trim length at near the maximum case length. Because my cases are trimmed every time I resize and deprime them (if needed) I ensure that the cases are both all the same length as well as having the best neck grip on the bullet. In addition, longer necks help to slow throat erosion.
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