There are a lot of the "micro-niche" cartridges out there. One of my customers built a 45 Raptor, which is supposedly better than the 45 Hamr, which is better than the 450 Bushmaster, and so on. And every custom gunsmith has come up with his own version of an existing cartridge, tweaked to be slightly different than other similar cartridges, and come up with a dozen reasons why his is better than the other one. They can't all be right. But creative people create stuff, unique or not. I did my apprenticeship in a custom gunsmith shop of some note, and they had a whole line of cartridges they would chamber rifles in, and every one of them was better than commercial cartridges according to them.I personally would not waste any time developing yet another "microniche" cartridge since I would personally use one of the many existing straight-wall cartridges if (God forbid) I ever ended up hunting in a straight-wall only state;