Remington runs these along with other cases in batches. Reed's (a sponsor here) had some a while back, but do not know if they still do. They are due to run another batch at any time, just do not know when. I think all sources have dried up for now and we are all going to have to wait until they make their new run. BTW the new 17 Fireball cases are due out about the same time. I think they use the same equipment to run both of them, just the 17 uses slightly different dies in the end processes. I am waiting on the 221 cases too, I have 3 guns that digest them. If I have to, I will make some out of 223 cases, but would prefer to wait for original head stamped cases, just too much work.