https://gunmagwarehouse.com/ammunitio...
30 Super Carry was designed with concealed carry in mind and Jeremy thinks there is one problem with this cartridge...

So what’s the problem with .30 Super Carry? Well, he believes it’s the quantity of available firearms chambered in this caliber. Currently, only 4 guns are chambered in .30 super carry: S&W Shield EZ, S&W M&P, Nighthawk Custom 1911, and the Hi-Point Carbine.