Tinker, he removes the metal rim from a compression formed plastic case and then inserts a brass primer holder that slides into the old primer pocket, this holds a primer at 90 degrees and then a small hole is drilled in the case to accept the pin. Simple, and the case is thrown away after use and the insert is pushed out to be used again. Contact me by e-mail at Maandeabaines@btinternet.com and I will post you a photo copy. I will see if I can get one of the brass inserts too. Lagopus.....