California Code, Penal Code - PEN § 18735

(a) Except as provided by this chapter, any person, firm, or corporation who, within this state, sells, offers for sale, possesses or knowingly transports any fixed ammunition of a caliber greater than .60 caliber is guilty of a public offense.

(b) Upon conviction of an offense under subdivision (a), a person, firm, or corporation shall be punished by imprisonment in the county jail for a term not to exceed six months or by a fine not to exceed one thousand dollars ($1,000), or by both this fine and imprisonment.

(c) A second or subsequent conviction shall be punished by imprisonment in the county jail for a term not to exceed one year, or by imprisonment pursuant to subdivision (h) of Section 1170, or by a fine not to exceed three thousand dollars ($3,000), or by both this fine and imprisonment.