Teflon-coated bullet

Teflon-coated bullets, sometimes colloquially, but incorrectly known as "cop killer bullets", are bullets that have been covered with a coating of polytetrafluoroethylene.

History

In the 1960s, Paul Kopsch (an Ohio coroner), Daniel Turcos (a police sergeant), and Donald Ward (Kopsch's special investigator), began experimenting with special purpose handgun ammunition. Their objective was to develop a law enforcement round capable of improved penetration against hard targets, such as windshield glass and automobile doors. Conventional bullets, made primarily from lead, often become deformed and less effective after striking hard targets, especially when fired at handgun velocities. The inventors named their company "KTW," after their initials.

After some experimentation with sintered tungsten-alloy rounds, which were eventually abandoned due to supply and cost concerns, the inventors settled on a bullet consisting mostly of hardened brass with a steel core. In testing, the comparatively hard brass bullets wore out barrels far more quickly than standard solid lead and copper-jacketed lead rounds, since they did not deform to fit the rifling. In an attempt to reduce barrel wear, the bullets were experimentally coated with a protective layer of Teflon. The inventors, having also noted that the tips of canes were frequently covered with the relatively soft and malleable Teflon to help them grip surfaces, found that the addition of Teflon helped to prevent bullet deflection off of vehicle doors and windshields, further improving penetration against those surfaces.

Cop Killer

Cop Killer or cop killer may refer to:

See also

CSI: Miami (season 3)

The third season of CSI: Miami premiered on CBS on September 20, 2004. The season finale aired on May 23, 2005. The series stars David Caruso and Emily Procter.

Plot

Entering their third season, the Miami CSIs continue to work to rid the streets of crime using state of the art scientific techniques and back-to-basics police work. The team suffers a personal loss this season as Tim Speedle is gunned down while investigating a murder/kidnapping. Horatio hires Ryan Wolfe, a patrol officer with Obsessive Compulsive tendencies to round out their investigative squad. Facing their most explosive season yet, the team investigate piracy, car-jacking, gun-play, homicides involving snakes, and a tsunami.

Cast

Changes

Rory Cochrane left the series after the season premiere. Jonathan Togo joined the show and was promoted to series regular. Rex Linn became a new recurring cast member.

Main cast