I was recently looking at someone's ballistics test online, and noticed that among identical bullets, the slower ones penetrated deeper! (like 2100 vs. 2400 fps). And I've heard that the old-school african hunters viewed 2200 fps as ideal penetration velocity. Also, Garrett Cartridges claims that deepest penetration (at least in .458) occurs between 1300-1600 fps (and they're talking about NON-expanding bullets).
What do you all make of it? And by the way, I'd be interested if anyone has any such numbers in relation to 9.3mm