If a 9mm out penetrates a 45, try setting up some bowling ball pins or some oldsteel truck tire rims and tell me which has more penetration and knock down power. At a charging bear i want the largest caliber possible. We've tested both calibers and there is really no comparison. the 9 is alot faster but the 45 has a heavier bullet/energy especially idf you are using solids. I too prefer a hollow point.