Originally Posted by
jeepkid
I believe the new 6.5 Wby is based on the 270/257 Wby casing, not the .300 Wby so it's essentially a .264 Win Mag with a double radius shoulder.
No, the 6.5-300 Weatheby uses the full length 300 Weatherby case, not the standard length 7mm/270/257 case.