I made this punch yesterday to expand the necks of the tiny 5.7 X 28. I should be able to make a 190gr bullet out of them. It took about an hour with all the trial and error to get the taper correct. Crumpled a few cases before I got it right. The punch is made for the Corbin "S" press. I bought an RCBS shell holder and use the reloading adapter to hold the brass. A little lube and good to go.
Pete