Another point on NYC law, it's illegal there to possess a cartridge for a gun you don't have a license for in NYC. So if you own a single .470 Nitro cartridge as a gee-whiz thing you can go down on a weapons violation if you don't have a rifle so chambered licensed.
I was actually concerned about this when I got my S&W 686, I wasn't sure the dunderheads at NYC license division knew that .38's worked in a .357.
This guy is going away for a while it seems.