I'm always a bit surprised by Docs use of Conepoints/KSs. I haven't used them that much but found them a quite soft bullet.

Which is a pity. The 300 gr KS in RWS .375 H&H loaded ammo in my Whitworth M98 shot at a very fast speed for a .375 H&H Mag with a shortish barrel. I forget, maybe 2700 fps? Or more? My usual Woodleigh Weldcore 300 gr is only 2,350 fos from handloads. And the 300 gr KS RWS loaded ammo made a tiny 3 shot one hole group at 100 metres.

I don't usually use .375 factory ammo.

But why a .375 300 gr KS? I wouldn't use it for buffalo or eland. If choosing a specific plains game projectile, I'd go for a 270 gr or 250 gr. I actually just use the 300 gr Woodleigh RN for everything.