Originally Posted by cross
My opinion is that a 7mm/300 Winchester would be a fantastic cartridge that would come close to splitting the difference between a 7mm Rem Mag and a 7mm STW capacity wise and would provide velocities closer to an STW than the standard 7mm Rem.
There already is a cartidge that splits the difference between the 7 Rem Mag and the 7 STW. Its called the 7mm Weatherby Mag. No specialty chamber dies needed. Reloading dies are readily available. Norma makes the brass.
Want something more powerful than the STW? 7-300 WEATHERBY Mag. It has been out for a while so reamers and dies should not be hard to find. Again, Norma makes Weatherby brass.
Do I have a thing for Weatherbys? You bet. Roy Weatherby knew what he was doing when he developed his cartridges.