The NRA comes up with a good idea.  It's so obvious, I don't know why I didn't think of it.  Although to be fair to myself, I didn't realize the ATF had an "illegal gun hotline."  Sounds like a handy way to anonymously create harassment of some neighbor who's been irritating you.

Anyway, from the NRA blog:

Well, I think it's time we help out the ATF agents that enforce our nation's gun laws. We need to call their Illegal Gun Hotline at 1-800-ATF-GUNS (that's 1-800-283-4867) and alert them to this illegal firearms activity. Tell them that New York Mayor Michael Bloomberg is hiring private investigators to initiate straw purchases in several states, and you want them to enforce the law.

Just make sure you call from a pay phone.

Someone visited here after searching "is the Taurus 44 ten legal in California."

I think the correct model name is 4410.

And I think the correct answer is no, but someone who actually lives in California might know for sure.

I think that handguns which can shoot shotgun cartridges are illegal there.

Yes, it's a stupid law.  No, it doesn't make sense.  And no, such a law would not exist if the Constitution actually mattered in this country.