Handbook of Firearms and Ballistics: Examining and by Brian J. Heard

By Brian J. Heard

The up-to-date moment variation of guide of Firearms and Ballistics comprises contemporary built analytical options and methodologies with a extra complete thesaurus, extra fabric, and new case stories. With a brand new bankruptcy at the selection of bullet quality through x-ray images, this variation contains revised fabric on muzzle attachments, facts marks, non-toxic bullets, and gunshot residues. crucial analyzing for forensic scientists, firearms examiners, security and prosecution practitioners, the judiciary, and police strength, this ebook is usually a precious reference consultant for undergraduate and graduate forensic technology scholars.

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Additional info for Handbook of Firearms and Ballistics: Examining and Interpreting Forensic Evidence (Developments in Forensic Science)

Example text

These are fully automatic weapons generally chambered for pistol calibre ammunition. The simplest type of action encountered is a simple blowback. To overcome the problems of the cartridge exiting the chamber before the pressures have dropped to safe levels, a very heavy reciprocating bolt and a large spring are employed to delay the cartridge extraction. The classic example of this type of action is the Sten gun used by the British forces in World War II (WWII). Whilst this is an extremely simple, cheap to manufacture and reliable action, it does tend to be rather heavy.

22″ calibre. 1 (a) Pinfire cartridge; (b) lip fire cartridge; (c) cup fire; (d) teat fire cartridge. 2 Rimfire cartridge. 3 Centre fire cartridge. hollow rim of the cartridge case. As a consequence, the propellant is in intimate contact with the priming composition. 2). 44″ rifle were available around the 1850s, but it was not possible, with the technology available at that time, to produce a cartridge case strong enough to withstand reliably the pressures produced. The centre fire cartridge removed this limitation by providing a relatively soft cup containing the priming compound (the priming cap or ‘primer’) which was set into the centre of the base of a much stronger cartridge case.

To fire the fresh round, the pressure on the trigger has to be released and then re-applied. A few true automatic pistols have been commercially manufactured. Examples are the Mauser Schnell-Feuer pistol and the Astra Mod 902. Fully automatic pistols have, however, never been a commercial success due to the near impossibility of controlling such a weapon under full automatic fire. Each shot causes the barrel to rise during recoil, and before the firer has time to reacquire the target within the sights, the next round has fired causing the barrel to rise even further.

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