Firearms have been used since the settlement of
North America for many different reasons. They
were used by colonials to hunt game animals such as
deer and turkey. They were also used as protection,
from both wild animals and enemies. Today, guns
are used for a lot of the same reasons. They are used
for hunting, for protection, as well as for sport. The
focus of this presentation will be in semi-automatic
handguns, and the physics behind the recoil, the
automatic reloading, and the cartridge itself.
There are a few different types of handguns, with
many different calibers shot through them. Some
common calibers are .22LR, 9mm, .40 S&W(Smith
j and Wesson), and .45 ACP(Automatic Colt Pistol).
Semi-automatic handguns normally have a
removable magazine that feeds the ammunition into
the breech. The recoil from firing the bullet is then
used to move the slide and replace the bullet with a
new one from the magazine. In this presentation the
focus will be on a Colt 1911, produced in 1917,
chambered in .45 ACP.
Left to Right: .22LR, 9mm, .40S&W, .45 ACP