While this may be a bit out of the purview of normal reloading. For those who were ever interested in everything that goes into making ammunition, there's a good book out there (for free) on google books. http://bit.ly/hWOVkf Cartridge Manufacture by Hamilton. 1916. Very good book that covers much of the technology involved and a good primer for people who want to know more than a regular reloading manual teaches.