2 bore

Two bore or 2 bore is a mostly obsolete firearm caliber.

Specifications

An historical two bore fired spherical balls or slugs of hardened lead or, in the modern metallic cartridge, additionally a solid bronze projectile. The nominal bore is 1.326 inches (33.7 mm), and projectiles generally weigh 8 ounces (225 grams; 3500 grains). The velocity is relatively low, at around 1,500 feet per second (460 m/s) at the muzzle, but develops approximately 17,500 ft·lbf (23,700 J) muzzle energy.

History and background

The largest size ever created for a shoulder rifle and used mainly in the 19th century for hunting large dangerous game animals. This caliber was used by European hunters, notably the British, in tropical climates of Africa and India. Loaded with black powder, it was unpopular due to thick smoke and excessive recoil. The rifle was fired from the shoulder by one person. Larger guns existed, such as the punt gun, but these were only fired supported and generally from a prone position. Sir Samuel White Baker, British explorer and hunter of the Victorian era, was impressed by its power, but heavily disapproved of the recoil. He narrates dashing adventures with his two-bore rifle, which he affectionately referred to as "Baby":

Bore

Bore or Bores may refer to:

Relating to holes

Places

People

Maritime shipping

Boreč

Boreč is a village and municipality in Mladá Boleslav District in the Central Bohemian Region of the Czech Republic.

References

Coordinates: 50°024′036″N 14°044′014″E / 50.41000°N 14.73722°E / 50.41000; 14.73722

Bore (wind instruments)

The bore of a wind instrument is its interior chamber that defines a flow path through which air travels and is set into vibration to produce sounds. The shape of the bore has a strong influence on the instrument's timbre.

Bore shapes

The cone and the cylinder are the two idealized shapes used to describe the bores of wind instruments. These shapes affect the harmonics associated with the timbre of the instrument. The conical bore has a timbre composed of odd and even harmonics, while the closed cylindrical bore or closed tube is composed primarily of odd harmonics. The harmonic characteristics of instruments such as the clarinet (closed cylinder) are more variable than a given waveform and bore alone is not the only determining factor. The timbre of a clarinet, for instance, mainly depends on the construction of the mouthpiece and the properties of the reed. Furthermore, minute changes in air pressure and pressure applied to the reed (vibrato, slurs) modulate the tone.