In 2016, California voters approved Proposition 63, which, among other things, banned the possession of large-capacity magazines for firearms, those that hold more than 10 rounds (Ballotpedia - California Proposition 63). After a series of decisions at the district and circuit court levels, including a remand from the US Supreme Court, the Ninth Circuit ruled 7-4 on 20 March 2025 that the state's ban did not violate the Second Amendment (AP, Duncan v. Bonta - Ninth Circuit Decision). The California Rifle & Pistol Association, which is party to the lawsuit, stated that it will "seek review from the Supreme Court immediately" (California Rifle & Pistol Association). The question is only concerned with whether the US Supreme Court will agree to hear the case. An order vacating the Ninth Circuit's decision and remanding again for further proceedings will count (e.g., Supreme Court - Order List 30 June 2022, see 21-1194 on page 2).

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