David, the best place to get C&R info on CA is the website
www.calguns.net If you ask your questions there, fairly soon somebody who actually knows will respond. You do have to be able to sift the wheat from the chaff among responses, tho, and that may involve a call to DOJ. Their number is at the top of the Calguns website homepage. I have found that they respond quite well to respectful questions--THEY didn't make up our stupid gun laws, but they do have to enforce them. Not a fun job, I'm sure.
Your C&R license allows you to receive C&R long guns shipped directly from an FFL or C&R FFL in another location in CA or another state without any requirement except getting a copy of the sender's C&R license or FFL and recording the transaction in your "Bound Book." As I understand it, handguns of any type considered firearms by Federal law must go FFL to FFL. (Ask DOJ about that to be sure). Cap and ball or flintlock handguns are NOT firearms under Federal law. Cartridge arms of any age are.
C&R long guns can be sold face-to-face by two CA residents in-state without any paperwork except verifying that both seller and buyer are 21. No DROS, no fees, no licenses, no paperwork, no tax, no waiting period. IF you have a C&R license, you must put the details of the transaction in your bound book. The rest of us just get the money or the gun and go about our biz. (This explains why C&R-qualified guns are hot items in CA).
Non-C&R long guns ("Modern shotguns") must go FFL to FFL and are subject to the 10-day Gun Jail, DROS and DROS fees. Even if the deal is face-to-face within the state.
I won't go into the "Safe Gun List" since it applies to handguns only and makes my blood pressure dangerous.....