there are no regulations/provisions for shotgun ammo at all. the Legislature did
pass AB962 which deals with handgun ammo, but that's being challenged and apparently doesn't really ban the shipping if the carrier asks for identity.
I don't think the Commiefornia law goes into effect until February 1, 2011. Ammo that will fit in a pistol will be effected. It may include all sizes that have had been used in "specialty pistols". They are still working on that. Like .270, .223, 30/30, 30/06, 357 Roberts, .410 shot shells etc., etc.. HANG ON, THE LIST WILL BE DEVASTATING FOR PEOPLE THAT HAVE AMMO SHIPPED TO THEM. Remember: the "Dumb-ocrates" are in charge.