i think its more of a fire code, this from another place
Most cities/counties use the Nat'l Fire Code. NFPA 495 Ch. 14, lists no limit for small arms ammo. But there are limits for components.
You'll have to check with your locality to be sure they follow NFPA.
There is essentially no regulation for individuals and assembled ammunition.
Health and Safety 12000 says
Quote:
(f) For the purposes of this part, "explosives" does not include
any destructive device, as defined in Section 12301 of the Penal
Code, nor does it include ammunition or small arms primers
manufactured for use in shotguns, rifles, and pistols.
Civil Code 3485 allows "abatement" of a "nuisance" of
Quote:
(c) For purposes of this section, "unlawful weapons or ammunition
purpose" means the illegal use, manufacture, causing to be
manufactured, importation, possession, possession for sale, sale,
furnishing, or giving away of any of the following:
(1) A firearm, as defined in subdivision (b) of Section 12001 of
the Penal Code.
(2) Any ammunition, as defined in paragraph (2) of subdivision (b)
of Section 12316 or subdivisions (a) and (b) of Section 12323 of the
Penal Code.
There are sometimes limits on powder/propellant, for reloaders.
Health and Safety Code 12001
Quote:
(f) (1) Black powder in quantities of 25 pounds or less in the
hands of a retailer having a permit issued under Article 2
(commencing with Section 6066) of Chapter 2 of Part 1 of Division 2
of the Revenue and Taxation Code and in quantities of five pounds or
less in the hands of all others and smokeless powder in quantities of
20 pounds or less used, possessed, stored, sold, or transported that
is exempted under, or authorized by, the Federal Organized Crime
Control Act of 1970 (Public Law 91-452) and applicable federal
regulations thereunder.
There are storage requirements for commercial operations.
But if you have the space and reasonable storage conditions for a million rounds, have at it.