SEATTLE — Lawmakers around the country are making a renewed push to ban high-capacity magazines that gunmen have used in many recent massacres, allowing them to inflict mass casualties at a startling rate before police can stop the carnage.

Nine states, including Colorado, have passed laws restricting magazine capacity to 10 to 15 bullets, and the Democratic-led U.S. House plans to consider a similar ban at the federal level in the coming weeks.

In arguing for the bans, politicians, experts and gun-control advocates point out that in the time it takes for a driver to wait through a stop light, a shooter with a 100-round magazine can kill and injure dozens of people.

The man who opened fire in Dayton, Ohio, last month killed nine people and injured 27 others in only 30 seconds, in part because of the 100-bullet drum attached to his rifle. It only took 85 seconds for a gunman to empty several 30-round magazines at an IHOP in Carson City, Nevada, killing four people and injuring 14 in 2011.

Authorities have not released any information on the accessories the gunman in Odessa, Texas, used over the weekend when he opened fire on police and bystanders with an AR-style weapon.

The deadliest example occurred in Las Vegas two years ago when a gunman possessed a dozen 100-round magazines that helped him squeeze off 10 rounds per second onto a crowd of concert-goers from his hotel room, killing 58 people.

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