Vice President Joe Biden says curbs on guns can reduce firearm deaths but won't ensure an end to mass killings like December's slaying of 20 first-graders in Newtown, Conn.

Biden met with Senate Democrats on Thursday to urge them to support the gun restrictions that President Barack Obama has proposed. They include bans on assault weapons and on high-capacity magazines for ammunition and requiring all gun buyers to undergo background checks.

After that session, Biden told reporters that the administration's plans would not eliminate the chances of another mass shooting, or bring gun deaths down to 1,000 yearly from the current 30,000 estimated by the Brady Campaign to End Gun Violence.

Biden said lives can be saved by curbing firearms without restricting the right to bear arms.