Sounds like you are going to have a long range hammer.
I recently bought a Mark4 4.5-14xPR (thanks BJ) [img]/ubbthreads/images/graemlins/wink.gif[/img]for my 280AI. Awesome scope. I am going to get a second one (from BJ) for my 338 RUM but just spent more money than I should have with my friend in OK. I am having M1 dials added to a VXIII 2.5-8x to get me going for now.
Have you considered the Nosler 225 gr AB for your 338 RUM?
This would be a great Elk bullet. I shot and recovered a few
from gallon milk jugs filled with water.