Oh crap, here we go again! Ok, so you have probably heard of the story of the fisherman in AK that stopped a bear with his 9mm using FMJ. I think he hit the hip, stopping/slowing the bear, and he and his companions finished off the bear. So in terms of the self-defense calibers (9mm, 40SW, 45 ACP), I know the 9mm FMJ is very good at penetration, but not at all comparable to the trail/hunting calibers (10mm, .357mag, .41mag, .44mag, .45LC and on up). In order to stop/slow a bear, you need to hit the central nervous system, or shoulders/hips. Assuming that the 9mm FMJ can penetrate to the hips or shoulders, does any one know if a 9mm FMJ or better yet a TMJ can penetrate a bears skull? The idea being that most people could dump a mag of 9mm quicker that any magnum. I don't plan on running in to a brown, but have spent time in AK. I can tell you that I was not afraid of browns as much as blackies. The browns 'usually' ran, but the blacks had very little fear of people. This also makes it relevant to encounters in the lower 48. People say that blacks are not a problem, but blacks have stalked and killed people. Trust me, if I am spending time in serious bear territory, I'll bring more than a 9mm. But, for trail use, I'm wondering if 147gr FMJ or TMJ wouldn't be so bad. Who wants to lug around a rifle or heavy magnum when bears are usually not present? Otherwise I'll stick to my street load of 147gr JHP. Honestly I'm more worried about a lose pitbull in the hood than wild animals, but I love these hypothetical scenarios! Please don't say, "you need 44mag, etc minimum". We all know that a rifle would be even better. Can a 147gr FMJ or TMJ penetrate a bear's skull?