This cartridge will fail miserably.
Not necessarily ... if the cartridge can be necked up to 7mm or 338cal, and it cleans out a regular 7mmmRemMag and 338WinMag chamber and will feed from the magazine and through the action ... it will potentially be a success just as the 7mmSTW was.
Most 7mmRemMags and 338WinMags come with 24-26" barrels, a simple rechamber that adds horsepower ... could be very interesting!
Cheers...
Con
