Mr Knight
Lest I’m misunderstood, the 250 Partition would be a better bet than the 275 Speer in your 338-06.
It gives you more range certainly and has a higher likelihood of perfect performance on elk. We have lots of evidence saying that is true.

What I can’t say is that there is something wrong about using the 275 Speer at 2400 + muzzle velocity on elk. I have no evidence of that to be true.
Best regards to you sir,
F01