polygonal rifling

polygonal rifling
   Helical grooves in the bore of a firearm barrel to impart rotary motion to a projectile.

Forensic science glossary. . 2012.

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  • Polygonal rifling — is a type of rifling wherein the traditional lands and grooves are replaced by hills and valleys in a rounded polygonal pattern, usually a hexagon or octagon. HistoryWhile polygonal rifling has been around since the earliest days of rifled… …   Wikipedia

  • Rifling — refers to the helix shaped pattern in the barrel of a firearm, which imparts a spin to a projectile around its long axis. This spin serves to gyroscopically stabilize the projectile, improving its aerodynamic stability and accuracy.Rifling is… …   Wikipedia

  • Internal ballistics — Internal ballistics, a subfield of ballistics, is the study of a projectile s behavior from the time its propellant s igniter is initiated until it exits the gun barrel. The study of internal ballistics is important to designers and users of… …   Wikipedia

  • Canon rayé — Le rainurage désigne le processus de fabrication de rainures hélicoïdales par l alésage du canon d une arme à feu. Ces rayures font tourner le projectile sur lui même autour de son axe longitudinal, cette rotation permettant la stabilisation… …   Wikipédia en Français

  • Rifle — A rifle is a firearm designed to be fired from the shoulder, with a barrel that has a helical groove or pattern of grooves ( rifling ) cut into the barrel walls. The raised areas of the rifling are called lands, which make contact with the… …   Wikipedia

  • ČZ vz. 82 — Infobox Weapon|is ranged=yes name=vz. 82, CZ 83 origin=flagcountry|Czechoslovakia type=Semi automatic pistol designer=Augustin Nečas design date=1982 service=1982 1993 (Czechoslovakia, since 1993 Czech Republic, Slovak Republic) cartridge= 9x18mm …   Wikipedia

  • Smoothbore — refers to a firearm or cannon which does not have a rifled barrel. History of firearms and riflingEarly firearms had smooth barrels, and fired projectiles with no significant spin. These projectiles had to be stable shapes, such as finned arrows… …   Wikipedia

  • Heckler & Koch SR9 — Infobox Weapon name= Heckler Koch SR9 caption= HK SR9TC rifle origin=flagcountry|West Germany type=Sporting and Target Rifle is ranged=yes service= used by= wars= designer= Heckler Koch, Inc. design date= 1990 manufacturer= Heckler Koch, Inc.… …   Wikipedia

  • Ballistic fingerprinting — Forensic science Physiological scie …   Wikipedia

  • Handloading — or reloading is the process of loading firearm cartridges or shotgun shells by assembling the individual components (case/shotshell, primer, powder, and bullet/shot), rather than purchasing completely assembled, factory loaded cartridges.… …   Wikipedia

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