The Glock 40 cal. semi is suppose to be a nice protective device. I have been considering one for working out on the ranch in case charged by a lion or pig. Quick, manageable, accurate shots, sent out with stopping power that won't just bounce off their heads is the goal. A 9mm is good for multiple close range hits while the 44 mag is powerful but slow. The 40 has the knock down and still pretty fast I'm told.