ANY mag over 10 rds is prohibited to be imported, sold, traded, manufactured, etc in CA. DO NOT bring your 12-rd mag into CA. It is possible that your firearm will be inspected before it is checked onto the plane. If the screeners is astute enough to notice the 12-rd capacity you may end up staying in CA longer than you want... though I hear we have some of the most hospitable jails.
There may also be an issue with bringing certain handguns into the state. I know there are some severe restrictions on what you can manufacture and sell. Hopefully someone else here can fill in the gaps... I seem to recall a 'safe firearms list' or some such nonsense.
Your standard hollow points are legal here. I think you just can't have incendiary rounds or anything designed to penetrate body armor.
As for flying out of SFO, I don't think there will be any issues. Just make sure your case is locked while transporting it.
If you want to learn more about OC in CA, I suggest you check out the CA OC flyer we have posted in another thread. We're not attorneys, but I think you'll find it is accurate.