Making new firing pins when you do not have one to produce a copy just the hole in the action were is once was. I have had this problem many times and my solution in making a new pin is this is this! Firstly I clean out the firing pin hole using pipe cleaners and an abrasive metal polish. After cleaning out the polish I use a clean pipe cleaner to apply a coating of oil inside the hole. Now I make a casting of the hole using "Dental Alginate" depending on the type of Alginate you have some are a liquid and others have the consistency of "Plasticine" so pour or push it into the hole. Before it sets which only takes a couple of minutes I push a sewing machine needle through the Alginate to the bottom of the hole. I use a sewing machine needle because it has a good size section for you to take hold of when you remove it with the casting from the hole. Nearly forgot to mention I roughen the shaft of the needle with some emery cloth to enable the alginate to take a firm hold.
