Ricochet


Ricochet

A ricochet (pronEng|ˈrɪkəʃeɪ "RICK-uh-shay") is a rebound, bounce or skip off a surface, particularly in the case of a projectile. The possibility of ricochet is one of the reasons for the common firearms safety rule "Be sure of your target—and of what is beyond it."

Variables

The likelihood of ricochet is dependent on many factors, including bullet shape, velocity (and distance), target material and the angle of incidence. [ [http://www.astm.org/cgi-bin/SoftCart.exe/JOURNALS/FORENSIC/PAGES/942.htm?E+mystore Bullet Ricochet: A Comprehensive Review ] , Burke, TW, Rowe, WF, Journal of Forensic Sciences, September 1, 1992]

Bullet

Bullet construction has a major factor in determining both the likelihood of ricochet as well as where the bullet will travel afterward. Hard bullets have a greater tendency to penetrate than softer ones. Bullets that break up, such as varmint hunting bullets have a low risk of ricochet. This is one of the reasons the newer .17 HMR round with its frangible bullet has gained popularity against the older non-fragmenting .22 WMR, because of the lower chance of ricochet.

Velocity

Ricochets are often more common with low power calibers such as .22 or .177 calibre, which can have trouble penetrating some materials, although a ricochet can occur with "any" caliber. Higher velocity projectiles have a tendency to either penetrate the target, and/or to break-up on contact with it.

Target material

Bullets are more likely to ricochet off flat, hard surfaces such as concrete or steel, however a ricochet can occur on almost any surface including grassed soil, given a flat enough angle when hit. Materials that are soft, give easily, or can absorb the impact have a lower incidence of ricochet, for example sand. [http://www.theboxotruth.com/docs/bot7.htm The Box O' Truth #7 - The Sands O' Truth] ] Though it may not be obvious, bullets easily ricochet off water. [Haag, L.C., "Bullet Ricochet from Water," AFTE Journal, Vol. 11, No. 3, July 1979, pp. 27-34.] [Nennstiel, R., "Study of Bullet Ricochet on a Water Surface," AFTE Journal, Vol. 16, No. 3, July 1984, pp. 88-93.]

Angle

The angle of departure, both vertically and horizontally, is difficult to calculate or predict due to the many variables involved, not the least of which is deformation of the bullet caused by its impact with the surface it strikes. [Jauhari, M., "Approximate Relationship Between the Angles of Incident and Ricochet for Practical Application in the Field of Forensic Science," Journal of Criminal Law, Criminology and Police Science, Vol. 62, 1970, pp. 122-125.] Ricochets will almost always continue on a somewhat diagonal trajectory to their original trajectory, unless it is against a flat surface perpendicular to the angle of incidence (or approach), in which case, it will reflect at an angle dependent on the other variables involved in the ricochet incident.

Dangers

Ricochets are a common danger of shooting because after bouncing off an object the bullet that ricochets poses an 'unpredictable' and serious danger to bystanders, animals, objects, or even the person who fired the shot. When the deformed projectile does hit a bystander or another target it can become very dangerous. Instead of cleanly traveling through the "body/object", the bullet can behave more like a hollow point bullet, causing a larger wound cavity, or even fragmenting and causing multiple wound channels.fact|date=August 2007

In rare cases, ricochets can return to the shooter. [" [http://www.springerlink.com/content/m9rjrud2a3qa8kp6/ A case of “boomerang” bullet ricochet] ", International Journal of Legal Medicine, October 1, 2001] This occurs when the object struck possesses enough resistance to withstand the impact of the bullet, and whose surface is perpendicular to the shooter. Some bullets are designed to deform at the nose, which is the main reason for the bullet ricocheting at such an extreme angle and returning in the shooter's direction.

ee also

* Gun safety
* Ballistics

References

External links

* " [http://www.ncit.com/Tips___Tricks/Ricochet/ricochet.html Ricochet Off Glass] " at National Crime Investigation and Training web site
* [http://www.break.com/index/bullet-ricochet-almost-kills-shooter.html Video of fake Bullet Ricochet on Shooter]

Recommended reading

* Federal Bureau of Investigation, "Bouncing Bullets," FBI Law Enforcement Bulletin, Vol. 38, Oct. 1969, pp. 1-9.
* Garrison, D.H., "Crown & Bank: Road Structure as it Affects Bullet Path Angles in Vehicle Shootings," AFTE Journal, Vol 30, No. 1, Winter 1998, pp. 89-93.
* Gold, R.E. and Schecter, B., "Ricochet Dynamics for the Nine-Millimetre Parabellum Bullet," Journal of Forensic Sciences, Vol. 37, No. 1, Jan. 1992, pp. 90-98.
* Haag, L.C., "Bullet Ricochet: An Imperical [sic] Study and a Device for Measuring Ricochet Angle," AFTE Journal, Vol. 7, No. 3, Dec. 1975, pp. 44-51.
* Hartline, P., Abraham, G. and Rowe, W.F., "A Study of Shotgun Ricochet from Steel Surfaces," Journal of Forensic Sciences, Vol. 27, No. 3, July 1982, pp. 506-512.
* Jordan, G.E., Bratton, D.D., Donahue, H.C.H. and Rowe, W.F., "Bullet Ricochet from Gypsum Wallboard," Journal of Forensic Sciences, JFSCA, Vol. 33, No. 6, Nov. 1988, pp. 1477-1482.
* McConnell, M.P., Triplett, G.M. and Rowe, W.F., "A Study of Shotgun Pellet Ricochet," Journal of Forensic Sciences, Vol. 26, No. 4, Oct. 1981, pp. 699-709.
* Rathman, G.A., "Bullet Ricochet and Associated Phenomena," AFTE Journal, Vol. 19, No. 4, Oct. 1987, pp. 374-381.


Wikimedia Foundation. 2010.

Look at other dictionaries:

  • ricochet — [ rikɔʃɛ ] n. m. • 1604; fable du Ricochet XIIIe; de ri, o. i., et coq, cochet; chans. à ritournelle où le mot coq revient 1 ♦ Rebond d un objet plat lancé obliquement sur la surface de l eau, ou d un projectile renvoyé par le sol ou un corps dur …   Encyclopédie Universelle

  • Ricochet — (französisch für Auf / Abprall) bezeichnet: Ricochet (Sport), Racket Sportart eine Technik beim Spiel von Streichinstrumenten, siehe Strichart das erste Live Album der Band Tangerine Dream Ricochet – Der Aufprall, Film von 1991 Ricochet… …   Deutsch Wikipedia

  • Ricochet — Разработчик Valve Дата выпуска 1 ноября 2000 года …   Википедия

  • Ricochet —   [rikɔ ʃɛ; französisch »Abprall«] das, , aus den Niederlanden stammendes, dem Squash und Racquetball ähnliches Rückschlagspiel, das als Einzel oder Doppel gespielt wird. Sportstätte ist ein Raum (»Court«) von 8 m Länge, 5,5 m Breite und 2,7 m… …   Universal-Lexikon

  • ricochet — (v.) 1758, originally in a military sense, from Fr. ricochet (n.) the skipping of a shot, or of a flat stone on water, in earliest use only in phrase fable du ricochet, an entertainment in which the teller of a tale skillfully evades questions,… …   Etymology dictionary

  • Ricochet — Ric o*chet , v. t. [imp. & p. p. {Ricochetted}; p. pr. & vb. n. {Ricochetting}.] To operate upon by ricochet firing. See {Ricochet}, n. [R.] [1913 Webster] …   The Collaborative International Dictionary of English

  • ricochet — [rik′ə shā΄, rik΄ə shā′; ] Brit [, rik′əshet΄] n. [Fr; used first in fable du ricochet (story in which the narrator constantly evades the hearers questions) < ?] 1. the oblique rebound or skipping of a bullet, stone, etc. after striking a… …   English World dictionary

  • Ricochet — Ric o*chet , n. [F.] A rebound or skipping, as of a ball along the ground when a gun is fired at a low angle of elevation, or of a fiat stone thrown along the surface of water. [1913 Webster] {Ricochet firing} (Mil.), the firing of guns or… …   The Collaborative International Dictionary of English

  • Ricochet — Ric o*chet , v. i. To skip with a rebound or rebounds, as a flat stone on the surface of water, or a cannon ball on the ground. See {Ricochet}, n. [1913 Webster] …   The Collaborative International Dictionary of English

  • ricochet — Ricochet, La chanson du ricochet, Asystaton, Asystatos cantilena, vt Asystatum argumentum, quod exitum non habet, B …   Thresor de la langue françoyse

  • ricochet — RICOCHET. s. m. Bond que fait une pierre plate, ou quelque autre chose semblable qu on jette, & qu on fait glisser sur la surface de l eau. Cette pierre plate & legere est bonne à faire des ricochets. il a fait quatre ricochets. On dit prov. C… …   Dictionnaire de l'Académie française