I'm sorry, I'm so used to typing 300 Win. Mag, that I typed the 375 as 375 Win. Mag. My mistake. The rifle that he shot the bear with was a 375 Holland and Holland Magnum, and the first shot at 20 feet DID NOT penetrate his skull,however it was not square on the skull, it was high on the forehead. The second round did break his shoulder and the last 2 went through the liver and abdominal area, and he still managed to travel over 400 yards and maul a horse. An 06 has no where near the power of a 375 H&H, and would had even less of a chance of stopping that bear. As I stated earlier, shooting an unsuspecting Grizzly that is standing broadside at 100 yards is one thing, and I still wouldn't do it with an 06, but a mad charging 10' Grizzly at 20 feet is something entirely different!