I am going Elk hunting for the first time this year. I have hunted all imaginable Texas game but this will be my first Colorado Elk hunt. I am using a 30-06 Ruger M77. I have been target shooting with Berger 210 VLD hand loads and can confidently and consistently hit targets out to 500 yards. However, I am concerned that this load might not have enough knock down power out past 300 yds. My muzzle veloscity is 2450 FPS. How much energy does it take to put an elk down with a well placed shot in the vitals?