As most people are familiar with the
general design of a revolver it is not necessary to go into great
detail, however revolvers do come in two general types.
(a) SINGLE ACTION
REVOLVERS: With this type of revolver the hammer must be manually
cocked for each shot before the trigger can be squeezed. Black
powder revolvers also fall into this category.
(b) DOUBLE ACTION
REVOLVERS: With this type of revolver a squeeze of the trigger
will both cock the hammer and fire the cartridge, however for
accurate and precise aim, the hammer may be cocked manually which
allows for a lighter trigger pull when firing. Revolvers range in
calibre from the 0.22 rim-fire to the 0.44 magnum and a few even
more powerful.