RE: WSM
If you want a handier,lighter, short action big mag yes, they offer an advantage. The velocities difrences for the 300 and 7 mag arent enough to make any difrence. The 270 realy shines IMHO in the shortmags but I also like the 300. The 270wsm and 300wsm are a commercial success and ammo should be easy to come bye for a long time coming.