I just fire formed some Ackley cases out of some factory loaded 25-06 rounds. After running them through Redding dies (three die set) to de-prime and the usual case prep several of the cases won’t even hold a seated bullet. The cases are Winchester. I was gonna anneal then eventually, would this help? I loaded up 16, 2 each of the same load increasing by 0.2 grains for eight total loads to test. I guess this is lack of neck tension from becoming brittle, I didn’t expect this from one firing. Sound right or something worse.