"When the president or senators threaten to take people's gun rights away, that's when we see things really pick up," said Bryan Schaff, owner of Hoffmeyer's Firearms & Sporting Goods in Grass Valley, Calif..
This phenomenon happened again last month during calls for new gun control measures after the shootings in Connecticut. "Since the school shooting there is nothing left out on the market at all," said Dan Hendrix, of Dan's Discount Guns & Ammo in Oakdale.
Some researchers said the notion that more legal gun sales would immediately lead to more gun injuries ignores a basic truth: Guns were everywhere in California a decade ago; and they are everywhere today.
More important than the increase in gun sales, several researchers said, is who is buying guns. Young men are the most likely demographic group to be injured or killed with a gun, state health records show.
"If you have a population entirely comprised of little old ladies, you can increase the number of guns and nothing is going to happen," said Will Vizzard, a California State University, Sacramento, criminal justice professor who has written extensively about guns and crime.
Vizzard noted that many crimes are committed using stolen guns gang members killing one another, for instance or by people who legally own a gun who get caught in the heat of the moment.
About 40 percent of guns used by felons nationwide were stolen or bought on the street, according to a survey released in 2002 by the U.S. Bureau of Justice Statistics.
Another 40 percent were obtained from friends or family, leaving about 15 percent purchased in stores and 5 percent acquired in other ways.
State officials do not release demographic information on gun owners, so it's not clear just who has been buying firearms in California. Gun dealers and gun rights advocates say that all types of people -- hunters, target shooters, moms, elderly couples -- are buying guns.
"It's a lot of first-time buyers," said Bill Sharff, co-owner of STS Guns in Folsom, Calif. "Half of the folks coming in here have never owned a gun."
Customers at area gun shops include older people and couples who enjoy testing their skills at shooting ranges, hunting game, firing at clay targets and participating in recreational gun clubs, dealers said.
It is not unusual, they said, for people who shoot for sport to have several guns of different types. Collectors may own a dozen or more weapons.
Daniel Webster, director of the Center for Gun Policy and Research at Johns Hopkins University, said he believes that most firearms sold recently in California were bought by people who already had guns, so the actual number of people who own firearms may not have risen much or at all.
Webster said the spike in gun sales has likely occurred among older men and women whose incomes have been less affected by the recession. "The behavior of these groups don't typically drive crime trends," he said.
Zimring, the UC Berkeley researcher, noted that gun ownership in California is much higher in rural, inland areas than in urban hubs like Los Angeles. Yet much of the decrease in crime over the last decade in California came in Los Angeles County.
Rural areas tend to have more hunters and more political conservatives who support unfettered gun rights than urban areas such as San Francisco, which had the lowest rate of gun sales in 2011.
"Most of the places where people buy and own guns are outside the places with the most residents," Zimring said. "You have to be specific," when looking at gun injury and sales data, he added. "A state with 50 million people is not the right unit of analysis."
There is one broad point of agreement between both sides of the gun debate: Whether the buyers are seasoned hunters or first-time owners, most guns purchased legally in California are sold to law-abiding, responsible citizens.
"The guns that are being recorded are legally purchased, and I really don't think that these guns are being used in criminal conduct," said former Sacramento County Sheriff John McGinness.
An important consideration, then, when talking about the relationship between legal gun sales and gun injuries, McGinness and others said, isn't how many guns are sold or crime trends in a particular area; it's the personal decision made by millions of Californians each day to keep their guns secure.
The number of guns stolen nationwide, along with other types of theft, has dropped sharply over the last 15 years, according to the U.S. Bureau of Justice Statistics.
"I hope that people who make the decision to purchase a gun store it safely," McGinness said. "And make it damned difficult for someone to steal it."
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