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Cheddite is a class of explosive materials invented in 1897 by E. A. G. Street of the firm of Berges, Corbin et Cie and originally manufactured in the town of Chedde in Haute-Savoie, France, in the early twentieth century.
Arvid Nelson was a partner in the business. The firm's first shipment was part of a defense contract to make primers using chlorate FA-70. CCI later moved on to much safer formulas for sporting ammunition. CCI provided the first reliable supply of primers for hobby reloaders. [2]
With quick firing guns (those using metallic cartridge cases) the case itself is fitted with the igniting medium; in England these are called primers. For small guns the case contains a percussion primer, usually a copper cap filled with a chlorate mixture and resting against an anvil. [2] The striker of the gun strikes the cap and fires the ...
Comparison of centerfire and rimfire ignition. Centerfire cartridges are more reliable for military purposes because the thicker metal cartridge cases can withstand rougher handling without damage, and is safer to handle because explosive priming compound in a protruding rim is more likely to be triggered by impact if a rimfire cartridge is dropped or pinched.
A worker at Lake City Army Ammunition Plant packs two cans of newly manufactured 5.56×45mm NATO ammunition into a wirebound crate. (c. 1998) Headstamp of a .50 caliber cartridge casing made at the Lake City Army Ammunition Plant in 1943 and recovered from the Sahuarita Bombing and Gunnery Range in 2012.
Lead azide in its pure form was first prepared by Theodor Curtius in 1891. Due to sensitivity and stability concerns, the dextrinated form of lead azide (MIL-L-3055) was developed in the 1920s and 1930s with large scale production by DuPont Co beginning in 1932. [10]
The first step to firing a firearm of any sort is igniting the propellant. The earliest firearms were hand cannons, which were simple closed tubes.There was a small aperture, the "touchhole", drilled in the closed end of the tube, leading to the main powder charge.
In the opening days of World War II, a chemist friend of Bruce E. Hodgdon was casually reminiscing about World War I.He mentioned the quantities of surplus smokeless powder the military had dumped at sea after the war; and speculated how useful that would have been to handloaders struggling through the Great Depression.