There are no practical spaces in the cartridge lineup that are left to fill. The only purpose for a wildcat is to allow the designer to thump his chest. Hey, we all need a little self-regard inflation now and then so I don't begrudge him his fun but any "advantages" he thinks it has over whatever else is out there are purely imaginary. 500 grains (grins?) is right. Whatshisface has designed a belted .404. Whoopee . . .