I've got a bit of american eagle fmj ammo. It has the primers crimped in. I just deprime and I've got one of those lyman tools that's a cylinder that screws apart and there's different bits inside it that screw into the handles. I just use the primer uniforming cutter and that does a good job. Ive tried my lee case neck deburer it kind of works but lyman tool works better. As above I wouldn't worry too much about the annealing, 223 doesn't seem to be prone to splitting necks and if you use a collet die your working the brass even less..
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