Last year, there was specific straight walled rifle cartridges allowable for use. New for this year.....
Straight-walled cartridge rifles in the following calibers: New this year! All straight-walled cartridge calibers from a minimum of .357 to a maximum of .50. Shotguns and straight-walled cartridge rifles can be loaded with no more than three shells in the chamber and magazine combined
That should open up some of those unused guns in your safe. I'm glad to see it.