Obviously you're going to get conflicting answers. ................ If you are accustomed to annealing each time and time isn't a factor(automated annealing). Why not uniform your neck tension which can vary widely even if the cases are all the same head stamp. ............ Monitor seating depth and powder OCW's to get a general idea of accuracy nodes so that you get some verifiable feed back on target. Rather than just blowing bullets down range for the purpose of F/Fing. ........... How consistent is the diameter of the "prepped" brass necks? This will tell you how uniform your neck tension will be. If you find it to be VERY uniform you needn't anneal. On the other hand .................................. Also,if your brass is mixed head stamp ya better annealThe seller said its once fired but I also anneal every firing. I really just want to make sure it won't hurt to anneal after processing then neck size again. Only about 200 cases so the time involved doesn't matter to me.