For this round, anyway:
A federal judge in California ruled that a law requiring background checks to purchase ammunition violates the Second Amendment.
Voters approved toughening California firearms laws to include background checks on ammo purchases in 2016, and the restrictions took effect last July. The California Rifle & Pistol Association filed a lawsuit against the state shortly after.
…
U.S. District Judge Roger Benitez called the law “onerous and convoluted” and “constitutionally defective.”
“The experiment has been tried. The casualties have been counted. California’s new ammunition background check law misfires and the Second Amendment rights of California citizens have been gravely injured,” Benitez, a Bush appointee, wrote in the ruling.
Suggestion to Californian gun owners: get ’em while you can. In your state, there are no guarantees against gun-control fuckwittery.