Originally Posted by Olympus
The OP has 9mm, .357, and .45. I'd say there's no reason to add a .40 to the mix unless he's just looking to collect as many calibers as he can. Practical difference between a .40 and the other 3 calibers he posted is minuscule at best. .22LR is definitely the better option in this scenario.
I was thinking more in terms of carrying. I agree there is no practical diference between .357, .40 and .45, in terms of the damage they can do but depending of the gun of course, there are significant differences in size and fire capacity of those guns. I know it is mostly a matter of personal preference but for example, I cannot always conceal my glock 21 as well as my taurus 617(.357). On the other hand, the taurus has a 7 round capacity while the glock 21 has a 13 +1 capacity. Same with the 23, only that it is a smaller package. As for Me....... I love them all!