FYI
Rimfire and centerfire
Q: What is the distinction between rimfire and centerfire cartridges?
A: The terms rimfire and centerfire describe two basic types of cartridge
design. The difference between the two types is in the location of the
priming compound in the cartridge case. The priming compound initiates the
burning of the main powder charge when it is struck by the firing pin of the
gun.
A rimfire is so called because the priming compound is actually inside the
rim of the case, which is
