If you do shoot lead in a non-toxic area and you get busted, it won't do the rest of us any good at all if word gets out to the general public. And if you think this is strictly a CA issue, do some research. Many other states are in the process of legislating non-lead and the Feds have the National Parks non-lead for fishing [and I believe Federal Wildlife Areas for hunting]. Even MT is seriously looking at banning lead.
On another note, I reload everything but 22 rimfire and have for years. Just spent an hour looking at all my usual vendors and the only thing I can find for CA shotshell reloading are wads, steel shot, and Longshot powder. No primers, hulls, or other powder anywhere.