Sounds like the problem of running .300 Winchester cartridges loaded with long bullets through a standard length magazine could be solved by using a magnum length magazine, but since Hornady is in the cartridge making business rather than the rifle building business, they chose to market a shorter, fatter, cartridge with more case capacity than the .300 WSM for people who exclusively shoot factory ammo. I could be wrong, but it seems like it would be a small number of shooters, who would specifically chose magazine fed, heavy, extended range, factory ammo over equivalent handloads. Everything else the guys in the video talk about is smoke and mirrors, since good accuracy is handily achieved with the .300 Winchester handloads, which if what they say was true, would not be possible. So, how much would 1000 rounds of factory .300 PCR ammo cost be, compared to 1000 rounds of .300 Winchester handloads? I expect I'll stick with my .300 Winchester, but who know what the future will bring.