First of all, I've read all threads here and elsewhere about "stopping power" of the 9mm vs. the .40 which has made things clear as mud, so my intention here is not to start another one of those threads.
Here's my situation:
I've been carrying a Springfield XD-9 (4" barrel) since I got my HCP about a month ago but it is kind of heavy and bulky so I've decided to buy another XD in the subcompact (3" barrel) size. From what I've read, the weight is around 20 oz. vs the 26 oz. of the one I'm carrying now.
Here's the question:
Would you buy another 9mm or go .40 cal for the new gun?
I think the obvious advantage of the .40 is the stopping power (assuming that I am equally proficient with either gun).
However, will the shooting characteristics of the .40 be different enough from my current 9mm to require a great deal of practice with the .40 in order to be equally proficient? If so, then I guess the higher cost of .40 ammo would weigh into the equation.
Would the convenience of having both guns use the same ammo be enough to have any impact on your decision?
Is the weight difference between 13 rounds of 9mm ammo and 9 rounds of .40 ammo at all significant? Would the 13 round mag capacity of the 9mm vs. the 9 rounds of .40 sway your decision?
Just looking for some opinions. Thanks.