Firearms are often broken down further by the action type, which describes how the firearm loads and fires each cartridge.
Single-shot firearms Single-shot firearms used for hunting generally fall into three categories: • Falling-block action • Break-barrel action • Single-shot bolt action Single-shot firearms when used for hunting have some advantages over other rifles: they are cheap, they are usually more accurate, and their silent action does not scare
game. On the other hand, their single-shot characteristic limit one's ability to make follow-up or repeated shots quickly, when the first round does not provide a clean kill or when multiples of game appear. Likewise, when hunting dangerous game, having only a single shot capability increases the danger for the hunter, and single-shot firearms are therefore rarely used for hunting dangerous game. Single-shot designs can be found in all classes of hunting firearms, including rifles, shotguns, and handguns.
Multi-barreled firearms Rifles and
shotguns containing multiple barrels are some of the oldest types of multi-shot firearms, and their use continues to this day. These guns are traditionally used for hunting fast-moving or dangerous game, as the simplicity of the design makes a rapid second shot quick and certain; double rifles are known as
express rifles or when combined shotgun with rifle, are known as a
combination gun, the original "combination" guns and are mostly manufactured by specialized gunsmiths in Europe. The
double-barreled shotgun is still the primary choice for most shotgun sporting events, as well as hunting of game birds. The
double rifle, due to the difficulty involved in regulating the two barrels to impact at the same point of aim, is prohibitively expensive; for example, a Purdey, Parker or Holland & Holland double rifle sells between US$50,000 to $150,000. Combination guns, containing two, three, four, or five barrels, most often with a mix of rifle and shotgun barrels, and are popular choices for hunting in Europe. A typical three barrel drilling mix of a
rimfire rifle, a powerful
centerfire rifle, and a shotgun barrel allows the taking of a very wide range of game with a single gun. Multi-barrel designs in hunting guns are generally restricted to rifles, shotguns, and combination guns.
Revolvers Revolvers use multiple chambers and a single barrel to provide much of the reliability of a multi-barreled firearm without the weight and expense. Generally found only in handguns, the revolver is becoming increasingly popular for hunting ever larger game, as shown by earlier developments such as the
.41 Remington Magnum, and
.44 Remington Magnum, and by later developments such as the
.454 Casull,
.460 S&W Magnum,
.480 Ruger, and
.500 S&W Magnum.
Repeating action types Repeating actions provide an easy way for the user to load a new round of ammunition into the firearm, usually from a spring-loaded magazine. These may be manually operated, or powered by energy tapped from the firing of a cartridge. •
Bolt-action firearms are rugged, reliable, and typically the most accurate, due to the strong camming action that locks the bolt into the receiver. The disadvantage is that bolt actions require removing the firing hand from the trigger to operate the bolt, which requires more time between shots than other repeating actions. •
Lever-action firearms represent the earliest successful repeating actions. Essentially unchanged for over a century, lever action rifles are faster to operate than a bolt action, though the traditional designs and tubular magazines used limit the pressures and bullet shapes that can be used. The use of lever action hunting rifles is deeply embedded in American culture. •
Pump-action firearms are faster to cycle than lever actions, but are not well suited for firing from a supported position. Most pump-action designs are found in shotguns, which are typically fired from a standing position where the movement of the arm to operate the action is not an issue. •
Semi-automatic firearms are similar in principle to
Automatic firearms, but only allow one shot per pull of the trigger. These actions provide the fastest operation, usually allowing a shot to be fired as fast as the shooter can pull the trigger. Since the action requires the energy created by the cartridge to operate the cyclic, there is less felt recoil, however, they may fail to cycle under extreme conditions. ==Air rifles and air pistols==