500grains:

I will be using the 470 (.475), 500 grain, NF Cup Points on Cape Buffalo (possibly a few plains game as well) this July in Tanzania. The regulate nicely in my Merkel at a nominal 2170 fps. I expect they will do exceptional work. I shot a Hog during the DRSS with Cup Points, not much of a test, except the first shot (knee cap shot) was approximately 150+/- yards.

In speaking with Mike at NF, if I remember correctly, he advises to use FN Solids on Elephant not the Cup Points.