6.5 Grendel is about as straightforward as case conversation gets. Full-length size to bump the shoulder then trim. Trim quite a bit, actually. Without some kind of motorized trimmer it would be nigh on impossible.
Regarding conversion of 7.62x39 into 6 or 6.5; what are ya'll doing about the drastic AK case taper? About the only way to get rid of the taper is to load and shoot. Or hydro-form. Whidden and Hornady make water forming dies. I assume a few other companies do as well.
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