I am in the midst of switching to hornady small rifle primer brass the brass neck thickness measures. 014 to .0145. When I fired the rounds I notice that now my empties will not accept a new bullet in they appeared to be ready to be reloaded . Why do you think my fired brass won't accept a bullet without opening the necks up. This is being fired from a stock savage rifle rifle LRPV. My previous loads were fired from hornady factory brass. Neck thickness. 0125. I would think the chamber should be OK with that.