That particular bull was flattened at about 50yds range, so can only guesstimate from the ADI load data. But on a frontal shot I took on another buff a few years before, that RNSN was found in the lower paunch. In my current avatar, that hippo was brained at 50yds.
My pet 458 load is 72gr of AR2206H, pushing a 500gr bullet, giving a calculated 2110fps (don't have a chrony). This powder charge is bang in the middle of ADIs published data, and isn't compressed: and has worked so damn sweetly every time!! In my rifle, as both the RNSN and FMJ have almost identical BCs (not that it matters much out to 50yds, but hey....?), off the bench I consistently get cloverleaf groups with each of these two projectiles - with about half an inch between both groups.
I'm very happy in attaining such accuracy from this rifle/load combo, that I felt very confident in dropping my first hippo, through the neck, while he was on the run at 120yds.
Also the Woody 180gr PSP is just deadly in my .30/06, and in June I'm off with Pieter for eland, gemsbok and maybe kudu with my 9.3x62 - where I'll be trying out Woody's 286gr RNSN. When I get back, I'll let you know how I go.
Cheers!