I have seen a 150-grain Partiton from a .270 Winchester deflect somewhat on a cow elk's leg bone. Haven't seen a .30 caliber 200 Partition do the same thing, either from a .30-06 or .300 magnum, and I've used one to shoot a 6-point bull at 75 yards in the big shoulder joint.
I'd be curious to know if those trends hold true over dozens of samples with each...
I'm trying to find ANY soft point bullet in ANY cartridge/caliber that will penetrate with my 50-90 Sharps, I just shot a bedded 1800 ln bull Eland in the right ham at 60 yards, the skinners found the 750 gr cast lead bullet in the front of his left shoulder, that's near nine feet of straight line penetration.
The bullet has a 770" expanded nose and still weighs 743 grains.
