Supreme Court Being Asked to Hear Magazine Capacity Case

California’s magazine capacity limitation law from 2000 has been under fire for several years. In 2016, the law was supersized, completely banning magazines that hold over 10 rounds. Formerly petitioned to the Supreme Court of the United States, Duncan v. Bonta was granted, vacated, and remanded to the lower court in the wake of NYSRPA v. Bruen. The National Rifle Association-backed case has returned to SCOTUS and they’ve filed a petition for a writ of certiorari on August 15, 2025.

Named plaintiffs Virginia Duncan, Richard Lewis, Patrick Lovette, David Marguglio, and Christopher Waddell are joined by California Rifle and Pistol Association in this challenge. The petition was filed by the powerhouse firm Clement & Murphy, with Paul D. Clement and Erin E. Murphy listed as the counsels of record.

“Since 2000, California has prohibited the manufacture, import, sale, and transfer of ‘large-capacity magazines,’ defined by the state as ‘any ammunition feeding device with the capacity to accept more than 10 rounds.’ In 2016, the state banned the possession of such magazines, and required any lawfully possessed magazine to be surrendered, permanently altered, or destroyed,” the National Rifle Association said in a release. “This lawsuit was filed before the possession ban took effect, alleging that it violates the Second Amendment and the Fifth Amendment’s Takings Clause.”

In the petition, Clement and Murphy laid out the history of the case, asserting that “it should have been easy to see that California’s ban on feeding devices that can accept more than ten rounds of ammunition violates the Second Amendment.”

For the district court, that was indeed easy to see. But the Ninth Circuit would have none of it. The court bypassed the ordinary panel-review process, reconvened an en banc panel that now consisted mostly of judges not in active service, granted “emergency” relief to the state over the dissent of most of the active judges on that panel, and ultimately held that California’s sweeping and confiscatory ban on some of the most common arms in America does not even implicate the Second Amendment right to keep and bear arms. 

Executive Vice President Doug Hamlin of the NRA weighed in on the filing. “Tens of millions of Americans lawfully own hundreds of millions of the magazines that California bans,” said Hamlin. “The Supreme Court should take this case to vindicate the rights of Californians and reaffirm that the Second Amendment prohibits the government from banning common arms.”

In the filing, they further argue that the 9th Circuit erred in their decisions. They state that the 9th’s decision can’t “be reconciled with this Court’s precedents or the constitutional traditions.” And, they observed that the circuit court professed “surface-level adherence to Heller, Bruen, and Rahimi” but “ultimately cast those decisions aside, pawning off interest-balancing as careful consideration of constitutional text and historical tradition.”

On behalf of the litigation arm of the Association — the NRA Institute for Legislative Action — Executive Director John Commerford said that: “After nearly a decade of litigation, two en banc decisions, and a prior remand from the Supreme Court, this case is more than ready for the Court’s review.” Commerford continued, “the people of California have endured long enough” and that “it’s time to restore their constitutional rights.”

The frenzy of post-Bruen grant, vacate, and remands that occurred in 2022 are coming home to roost. Snope v. Brown out of Maryland was one such GVRed case that was denied certiorari when represented to the High Court. Snope did not deal with magazine capacity restrictions, but rather so-called “assault weapons.”

The magazine question in Duncan, which affects Heller-protected handguns, could be the stepping stone SCOTUS uses to get back to the topic of semi-automatic rifle prohibitions.

A New Jersey case, also NRA backed — ANJRPC v. Platkin — was also in the batch of punted cases. Like Duncan, it concerns magazine capacity and is sitting at the Third Circuit Court of Appeals in a post-argument state. (ANJRPC has been consolidated with two semi-automatic rifle ban challenges and that might be an interesting twist in the prevailing days).

Will the High Court pick Duncan v. Bonta as the case to settle the debate on magazine capacity restrictions? Possibly. Or, is it more likely the justices wait out for an opinion from the Third Circuit on the New Jersey case in hopes that there’s a split? We’ll be watching the Supreme Court’s calendar when the session starts to see if Duncan makes the cut.

Editor’s Note: Unelected federal judges are writing the Second Amendment out of the Constitution. 

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