Interesting - we have some jerks in New Jersey that are currently trying to outlaw everything 50 caliber & up including all antique and blackpowder rifles, etc.

What about other .50 caliber cartridges like the 500 Wyoming Express or the 500 JRH or the 500 Linebaugh? Are they also illegal?

You can't wait any longer. Join the NRA and start writing your Congressmen and Senators.