https://www.remington.com/360buckhammer.html

I suppose if a guy had a .30-30 or .32 Special with a bad bore, it could be rebored to this.  Reminds me a lot of of the .35/.30-30 wildcat cartridge. That was a fair option when a .30-30 or .32 Special was in need of a rebore.  At least with this new Remington cartridge you have factory ammo.  Of course, that means little to most of us who load are own.  

Something, “new” anyway.