California’s lead ban law was signed in 2013. It gradually banned lead for various species until a full ban took effect in 2019. The catalyst for the ban was the California condor, which was constantly getting lead poisoning from eating hunter-shot carcasses. Other raptors, like golden eagles, were similarly affected.
I’m conflicted about the ban. Lead has been shown to be problematic for wildlife. Here’s a recent article on the effects of lead on condors. I know some of the authors; this is solid work.
https://www.pnas.org/content/109/28/11449
You may not think that condors are worth all this effort and money, and you may be right. But lead poisoning is a much bigger issue than condors. Having said that, I do think the lead ban has been a slippery slope in California. We can’t hunt bobcats anymore, can’t use hounds for bears, and almost lost our ability to hunt bears this year.
I don’t mind using copper for big game (amazing results, frankly), and I’m accustomed to steal shot at this point. I also don’t miss picking lead fragments out of my teeth when eating venison. But be on guard for your hunting privileges.