Just received my decapping die today. I do a lot of military bass, with cripped primers, such as the 7.62 NATO cartridge. I have been using the decapping rod, base, and mallet. It works but is slow when doing several pieces. This die works great for those cases, plus .45 ACP and 9mm. Also tried it on some .38-55 Winchester and all I had to do was change the shell holder. If you reload you should have one of these.