My long range hunting rifle is my 7wsm but I practice with a 260 to save barrel life.
In my opinion there's nothing wrong with your 270wsm shooting 150gr given that it shoots well at the range you would be hunting. Better yet, if you had an 1:8 twist barrel you could take full advantage of Bergers 170 gr hunting bullet.
You probably hunt deer more than elk and a 600 yard max range as my premiss I would say 260 shooting 130/140gr, 308 shooting 168/175gr., and 7mm-08 shooting 162/168gr. There are other 6.5mm offerings out there that would work as well.
In my opinion there's nothing wrong with your 270wsm shooting 150gr given that it shoots well at the range you would be hunting. Better yet, if you had an 1:8 twist barrel you could take full advantage of Bergers 170 gr hunting bullet.
You probably hunt deer more than elk and a 600 yard max range as my premiss I would say 260 shooting 130/140gr, 308 shooting 168/175gr., and 7mm-08 shooting 162/168gr. There are other 6.5mm offerings out there that would work as well.