No. The only part of the "new" case that was sized was the neck, with a neck die, the body was not touched. I do not full length sized any of my BPCR cases and several are not resized at all. Besides, a rimmed case head spaces on the rim not the shoulder and when using black powder the case will fire form to the chamber.
Fact is this is the only lot of brass that I have recieved from Jamision that has done this and several hundred previous pieces fire formed perfectly and none of them had shoulders that touched the shoulder of the chamber when new.
In any case, Jamison replaced the batch of brass. The replacment batch that was recieved did not have the off center bulge at the neck shoulder junction and every one of them fire formed perfectly. The only complaint I still have is that their rim thickness varies from .069 to .080.
