I was sorting brass cases and depriming a baggie full of 40 S&W I had some 9MM cases stuck in them I pulled out and tossed aside. While sitting there working the handle on the Lee Cast iron single stage press I had a thought. Many people make jacketed bullets from old cases that are smaller than the case you are shooting. I measured the 9MM..Too small for a 40 jacketed bullet. I measured a 380 case and I thought maybe i could run it through a .358 bullet size die. I tried to do just that with plenty of sizind die wax on the case. Nope! I got 3/4 of the way in and felt like the table was going to break. I pounded that case out and decided I needed to anneal a .380 case and try again. That went much better and I was rewarded with a .358" OD case. I have not taken it any farther but I did research it and some people have made jacketed bullets from that case for the 38-357 magnum. So Nothing new here. Just more work.