How is a single shot firearm different from a repeating firearm?
A single shot firearm is fairly self explanatory. You fire one
round, then the weapon must be reloaded with a new cartridge prior
to being able to fire again. A repeating firearm gets a bit more
complicated because of the incredible number of variants that fall
into the category of "repeaters" but in a nutshell, if a firearm
holds more than one cartridge, or can have multiple cylinders
loaded (in the case of black powder revolvers) it is considered a
repeater. If you can fire more than one round without having to
reload the weapon, it "repeats" and is therefore a repeating
firearm.