chrispie,

I did not use IMR4831 in my .500NE. That was a friend who developed a load using that powder. He doesn't post here, and I don't remember what his load was. If I remember to ask him the next time I see him, I will report it.

In his book, Grame Wright suggests that 4350 may be the better choice in the .500NE. See page 61 of the second edition.

I tried H4350 on my first day out, and hit pay dirt. I never saw any reason to use anything else in my rifle.

Curl