RE: 300 remington ultra mag
Might want to check the Gun Section. I asked a question regarding 300 RUM vs 300 WBY (in the last two weeks) and got allot of good feedback. I agree with PaJack the RUM is better than the WBY. It will definitely take out the Elk, as for the Grizzly, I think you would need atleast a 200 gr. bullet or larger.