Well, excuuuuse me! My old and feeble brain seemed to remember KB shooting a trainload of elephants with a 7mm rifle. A 7mm-08, I was thinking. Thinking that hard gives me a headache. I never implied that Bell had a death wish or was stupid. That would be me talking about me. I'm sure you are correct about his hunting styles. My point is that you can kill a very large and powerful, completely enraged herbivore with one shot from a small projectile, so a .30 caliber bullet of sufficient size, moving at sufficient velocity, CAN kill a brown/grizzly/polar bear. Would I use my son's .300 Win. Mag. for the job, NO. My wife would kill me if I did not use my 378 Weatherby that she saved up and bought me back in the early 80s. She would be more dangerous than any wounded brown bear. As for the kinetic energy experiment you are planning on trying so we can discuss the results later, that is a personnel choice between being impaled or being bruised. I will have to experiment with that problem a time or two.