In CA one can own and use all the hi cap mags they want. There is [b]NO[/b] ban on ownership as long as they were possesed before SB23 went into effect. I shoot in competition using hi caps right next to guys who are LEO. They know I have them and they know I am not LEO. It is NOT illegal to own and use them. It is only illegal to sell, give, import them, etc. That's why you don't see them for sale at the gun shows in CA anymore. I have heard, but not personally experienced, that some vendors at the gun shows in NV are asking if buyers of hi cap mags are from CA before making the sale. Although I don't know why they would. It is legal to sell them to a CA resident outside of CA. I just think they are covering their butts since those same vendors still sell at CA gun shows, minus the hi caps of course, and do not want to run the risk of being associated with the mags being "imported" into CA should the buyer somehow get caught and say, "yeah, I just bought these in Reno are taking them home to SF".