Definitely full length resize for a self-loader. The neck marks may be fine, it depends on how badly the rounds are dented. If there is no sharp fold or crease you're probably GTG. Semi-Autos are much harder on brass than bolt actions so that may factor into your decision & you may even keep separate brass for each gun because of this.
With a bit of research you can probably figure out exactly where the case is striking & put a Velcro "pad" there to minimize the damage.
Firm crimps to prevent set back or walking out of the bullets in the higher capacity magazines & making really sure the primers are below flush are probably the 2 biggest things to review in the reloading process.
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Allan Quatermain: “Automatic rifles. Who in God's name has automatic rifles”?
Elderly Hunter: “That's dashed unsporting. Probably Belgium.”
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