As Roy says it is described in that book. It was an invention by my old friend (now sadly deceased) Derek Fearn. I have a small number of these inserts. A small brass cylinder that inserts into the old primer pocket after a little drilling out. It then requires a hole to be drilled in from the side for a pin after first either swaging the cartridge head down or removing the brass head. In the article he shows this using a compression formed Winchester case which was Derek's preferred method. A friend has made some inserts for me on his principle which is very much the same but used the head swaging method. Then, quite by chance last Sunday, at an outdoor sale, I picked up 26 brass 12 bore purpose made turned cases which will allow unlimited reloads. I only have a 12 bore pin-fire so that is perfect. Lagopus…..
