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Cylindro-conoidal bullet

 

 
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Cylindro-conoidal bullet
 
 
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The cylindro-conoidal bullet was invented by Captain John Norton of the British 34th Regiment in 1832. It had a hollow base, so that, when fired, the bullet
Bullet

A bullet is a hard projectile propelled by a firearm, Sling , or air gun and is normally made from metal. A bullet does not contain explosives, but damages the intended target by tissue or mechanical disruption through impact or penetration....
 would expand and seal the bore
Bore

Bore may refer to:* Bore , the diameter of a cylinder in a piston engine* Bore , the interior chamber of a wind instrument* Bore , a district of Ethiopia that includes the town of Bore...
. The origin of his idea is an interesting one: when in southern India
India

India, officially the Republic of India , is a country in South Asia. It is the List of countries and outlying territories by total area country by geographical area, the List of countries by population country, and the most populous liberal democracy in the world....
, he examined the blow pipe arrows used by the natives and found that their base was formed of elastic
Elasticity (physics)

In physics, elasticity is the physical property of a material when it deforms under stress , but returns to its original shape when the stress is removed....
 locus pith, which by its expansion against the inner surface of the blow pipe prevented the escape of air past it.

In 1836, Mr. W.






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The cylindro-conoidal bullet was invented by Captain John Norton of the British 34th Regiment in 1832. It had a hollow base, so that, when fired, the bullet
Bullet

A bullet is a hard projectile propelled by a firearm, Sling , or air gun and is normally made from metal. A bullet does not contain explosives, but damages the intended target by tissue or mechanical disruption through impact or penetration....
 would expand and seal the bore
Bore

Bore may refer to:* Bore , the diameter of a cylinder in a piston engine* Bore , the interior chamber of a wind instrument* Bore , a district of Ethiopia that includes the town of Bore...
. The origin of his idea is an interesting one: when in southern India
India

India, officially the Republic of India , is a country in South Asia. It is the List of countries and outlying territories by total area country by geographical area, the List of countries by population country, and the most populous liberal democracy in the world....
, he examined the blow pipe arrows used by the natives and found that their base was formed of elastic
Elasticity (physics)

In physics, elasticity is the physical property of a material when it deforms under stress , but returns to its original shape when the stress is removed....
 locus pith, which by its expansion against the inner surface of the blow pipe prevented the escape of air past it.

In 1836, Mr. W. Greener, a London
London

London is the capital of both England and the United Kingdom, and the most populous municipality in the European Union. An important settlement for two millennia, History of London goes back to its founding by the Roman Empire....
 gunsmith
Gunsmith

A gunsmith is a person who repairs, modifies, designs, or builds firearms.Gunsmiths may be employed in:*factories by firearms manufacturers,...
, improved on Norton's bullet by inserting a conoidal wooden plug into its base. Although both inventions were rejected by the British Ordnance Department, the idea was taken up in France
France

France , officially the French Republic , is a country whose Metropolitan France is located in Western Europe and that also comprises various Overseas departments and territories of France....
, and in 1849 M. Minié adopted Greener's design and produced the "Minié ball
Minié ball

The Mini? ball is a type of muzzleloader rifle bullet named after co-developer, Claude Etienne Mini?, inventor of the Mini? rifle. It came to prominence in the Crimean War and American Civil War....
."