This is not correct.
The article soft peddles it. I may yet pursue some of those items. A suppressed bolt action 300 BLK would be decent for the mule deer in my area. The cartridge is attractive since you can make the brass from .223 brass and use the same stock of bullets that work for 30-30, .308 and 30-06. Common primers with the .223 and common powder with the 44mag.
The 300 BLK suppressed is quiet enough to shoot without "ears".