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Hiram Berdan (September 6, 1824 – March 31, 1893) was an American engineer, inventor, military officer, marksman, and guiding force behind and commanding colonel of the United States Volunteer Sharpshooter Regiments during the American Civil War. He was the inventor of the Berdan rifle, the Berdan centerfire primer and other weapons and ...
Berdan and Boxer primers are used in centerfire cartridges; the primers differ in construction. Various priming mixtures have been used in different sized primers to effect prompt ignition of the powder charge. Particles with relatively high heat capacity are required to promptly ignite smokeless powder deterrent coatings. Some priming ...
Boxer primers are similar to Berdan primers with one major difference, the location of the anvil. In a Boxer primer, the anvil is a separate stirrup piece that sits inverted in the primer cup that provides sufficient resistance to the impact of the firing pin as it indents the cup and crushes the pressure-sensitive ignition compound.
The 10.7×58mmR cartridge used in the Berdan was also invented by Hiram Berdan, with the assistance of Russian colonel Alexander Gorlov . It was the subject of many patents in both the United States and United Kingdom. The bottleneck cartridge case used the Berdan primer, its first use in a small arms cartridge.
Berdan Sharps rifle, the model of the Sharps military rifle used by Berdan's Sharpshooters; Berdan rifle, any of several rifles developed by Hiram Berdan after the American Civil War, principally the Berdan II (M1870) rifle of .42 caliber that was the standard rifle of the Russian Army in the late 19th century; Berdan primer
His 1866 "Boxer primer", very popular for centerfire ammunition. Ironically, the British widely adopted the berdan primer, invented by an American, while Boxer's British design was almost universally used for American cartridges.
Some of Berdan's inventions included the Berdan rifle (a repeating rifle) and the Berdan center fire primer, a range finder torpedo boat for evading torpedo nets during and after the Civil War. Berdan also developed the first commercial gold amalgamation machine to separate gold from ore.
Most surplus ammunition is steel-cased and uses Berdan primers, which effectively hinders its use for handloading. However, with the increased popularity of surplus Eastern-bloc Mosin–Nagant, SVT-40, and PSL rifles in the United States, Boxer-primed ammunition and unfired cases are increasingly available; these cases take large rifle primers.