I'll chime in for the good Doctor since I've spooged over that rifle at his place. It's a Jeffery's in 450-400 3"..
That one was taken with 400 grain Hawk SP over 60 grains of IMR 3031. I like Woodleighs, but had a shortage of them before this hunt. I thought I had 2 boxes of 50 and it turns out only had solids. Woodleighs were on backorder from everywhere. Hawk fixed me up with .050 jacketed SPs and they worked well.
I loved Tanzania, and wish I could go every year. Ruark and Selby hunted that area. Classic East Africa