Actually, he killed two buff with ONE SHOT! The bullet, a 400-grain solid, went through both shouilders of a bull, then both shoulders of a cow that was standing about 10 yards away from the bull, and both died! I don't believe a .458 Win. or a .416 Rigby would have shown any more penetration than that.

I beieve there is a "velocity window", between 1500 and 2000 FPS or thereabouts, where a bullet like the ones Pearse was using in his .45/70 will out-penetrate any slower OR FASTER bullets of like construction!