I have heard stories, (unverified) that undercover agents will monitor the Reno Nevada Cabela's, follow an ammo purchaser to the parking lot to see if they have California plates, follow them across the border and nail them. The stupidity of the law is, that as a non California resident I can purchase all the ammo I want in Nevada and take it in to California and not break the law. All ammo purchases for California residents require a background check and a fee. Technically, this includes you loaning a single round to someone on the range. Obviously, these stupid laws are not enforceable.

HWK