Handloading
Handloading or reloading is the process of loading firearm cartridges or shotgun shells by assembling the individual components (brass/shotshell, primer, powder, and bullet/shot), rather than purchasing completely-assembled, factory-loaded cartridges. Generally only Boxer-primed cases (see internal ballistics) are reloaded.
Historically, handloading referred to the private manufacture of cartridges and shells using all newly-manufactured components, whereas reloading referred to the private manufacture of cartridges and shells using previously-fired cartridge brass and shells with new bullets, shot, primers, and powder. In modern usage, however, no distinction is made in these terms, and they are considered synonymous.
The basic piece of equipment for handloading is the press. A press is a device that uses compound leverage to push the cases into the dies that perform the loading operations. Presses vary from simple, inexpensive single stage models, to complex progressive models that will eject a loaded cartridge with each pull of a lever, at rates of 10 rounds a minute.