As Ajo said shot placement will make any bullet work.. Is the reason you want to use a 150gr bullet because your gun shoots the best groups with it or because you like that weight the best? I would step up to the 180gr. Not sure if you have tried a heavier grain bullet in your gun or not.
I'm sure a well placed bullet will do fine, but like others have said here, I go with a 180gr in .30 caliber for Elk as well, leaving the lighter bullets for deer. I happen to use the Nosler Partitions, but get a good penetrating bullet like mentioned above as well.
If you pick up a reloading manual that has a balistic table in it you will find that the magnum calibers were designed to shoot the heaver bullets for better performance of game. The light bullets will work but then why did you buy a magnum rifle speed isn't everything.
I often use fresh earth dryer sheets while drying my clothes, after washing them in scent free soap. At some point I started putting these dryer sheets in the plastic tubs that I store my hunting clothes in. This seems to work very will. Anytime I pull my clothes out of the box they reek of fresh earth.
I'm too tight to be buying a bunch of scent loc, which I don't believe in. So this is a good and cheap alternative. I like it so much I even toss one in my backpack to help cover the...