Re: load workup for 300 RUM...
Your powder is to fast. You need to look more in the RE25, H1000, Retumbo, US 869 area or one of the slow vihtavouri powders. I shot a deer over 1000 yards this year with the 208 Amax at 3220 fps in front of H-870 powder.
The Amax bullets are to fragile for elk hunting except for the high shoulder shot. You could run into trouble there. The 200 accubond at .588 bc over 3200 fps is a better choice for elk.
Predictions are difficult, especially when they involve the future