RE: 300 WSM or 270 WSM
Compare balistic charts for your self. The 270 will kick less. (you may not be able to tell the difference on your shoulder until you have shot 20 rds. or more) I would say if you already have a 30-06 and would like another cartridge go with the 270wsm. All depends on the game you are after. The 270 wsm is pretty awesome IMHO.