I'm not sure if there's a specific point of time when residue is no longer detectable. It does depend much if the shooter had moved, or washed his hands. A delay of few hours my also make the residue undetectable.
http://yedda.com/questions/long_dose_gun_shot_residue_h...
Summary of the FBI Laboratory’s Gunshot Residue Symposium, ... The fourth transfer was noted on an individual who was handcuffed by an officer who had last drawn his firearm in the preceding 30 days. ... When asked if it is satisfactory to use one stub for sampling both hands together as long as tackiness remains,
www.fbi.gov/hq/lab/fsc/backissu/july2006/research/2006_... www.fbi.gov/hq/lab/fsc/backissu/july2006/research/2006_07_research01.htm
it remains on the surface areas for 78 hours. dispose of clothing with fire and use zinc based soap on skin surfaces, this greatly reduces the time.
http://wiki.answers.com/Q/How_long_do_traces_of_gun_pow...
The preliminary review of shooting and weapons cases from the past five years came after a Circuit Court judge decided last month to exclude a two-element particle of gunshot residue evidence from a trial.
www.truthinjustice.org/MD-gsr.htm
Puberty is nothing but 'teenage years.' It is the period of adolescence in which an individual becomes physiologically developed to procreate. Puberty is the phase between childhood and adulthood. On an average, the onset of puberty begins in the age ... How Long Does Poison Last On A Person? ... How Long Does Gun Residue Last?
www.blurtit.com/q981641.html
The bolt body has a patented guide rib located midway along the bolt behind the left (action open) or top (action locked) locking lug. This guide rib is only an inch or so long and looks uncommonly good. Most shooters would never know it is a separate piece from ... Ruger Rifles & Carbines: a Long Gun Legacy - Page One...
hunting.about.com/library/weekly/aastrugerlonggunsb.htm hunting.about.com/library/weekly/aastrugerlonggunsb.htm
Inventory: Long Guns ... Baker Gun Co., "R" Grade, 12 Gauge SXS Sidelock Shotgun With 30" Barrels, Krupp Barrels Retain 93% Blue, 40% Fading Case Colors On Frame, Nice Checkered Walnut Retaining 90% Finish With Some Marks From Use, C&R...
www.cherrys.com/longguns.htm www.cherrys.com/longguns.htm
It's hard to make the argument for the gun registry any better than Steven Chabot, president of the association of chiefs of police, who wrote in a letter to Harper last month: "All guns are potentially dangerous, all gun owners need to be licensed, all guns need to be registered, and gun owners ... Our long gun registry,
network.nationalpost.com/np/blogs/fullcomment/archive/2... network.nationalpost.com/np/blogs/fullcomment/archive/2009/04/10/chris-selley-kill-the-long-gun-registry.aspx
Canadians have spent $2 billion on a long-gun registry that's neither of use to police nor a deterrent to criminals. ... Since the vast majority of gun crime is executed using illegal weapons (by last count, only 7 per cent of firearm homicides were committed using registered firearms), Canadian taxpayers have spent $2...
www.themarknews.com/articles/257-tearing-down-the-long-... www.themarknews.com/articles/257-tearing-down-the-long-gun-registry
Minister of Public Safety Peter Van Loan shown in the House of Commons on March 4, told reporters on Wednesday that his government has introduced a bill in the Senate to end the long-gun registry. (Adrian Wyld/Canadian Press) ... Last Updated: Wednesday, April 1, 2009 | 6:12 PM ET CBC News...
www.cbc.ca/canada/story/2009/04/01/ottawa-gun.html www.cbc.ca/canada/story/2009/04/01/ottawa-gun.html