As the old line goes, "Bingo, Pinhead"! You're right on the money! If I could post pictures, I would post one of the Magnus II that completely severed a rib going in to my Cape Buffalo and completely severed a rib on the far side.
It is in perfect condition and could actually be used for hunting without re-sharpening! An unbelievable arrow head, in my opinion!
I re-read your first comments, tilzbow, and I'll give you a couple of thoughts on the STOS. My first comment is that it is made by Magnus, so you know the quality is perfect. Second...it's not wide enough!
African game has a different blood clotting factor than American game, according to a Pathologist friend of mine. You need to OPEN A BIG HOLE IN THEM, in order to get good blood trails and heavy bleeding. The Magnus I, in my book, is the only head I will use.
Cheers, mate!