Just a ? I'd like to pose to get a wide variant of opinions.
One of my EDC's that's in my rotation is a M&P mid-size .40/.357sig, it's presently configured .357sig.
The question I'd like to pose is the .357sig using plain ole FMJ ammo for plinking is harder to come by especially in bulk than the .40 FMJ. I know it's pretty much just a simple barrel change to convert, but I personally feel I'll be losing some knockdown power with the conversion, though I know the .40 still carries more than adequate protection and power.
What is the opinion on making the swap based soley on the cost efective variable in ammo price and availabilty? I'd like to put more rounds down range on the weekends beings that it is one of my EDC's, I just personally favor the .357, but as stated previously the ammo @ times makes this very expensive and a lot of times simply hard to acquire to do such.

On a side note when carrying I'm clipped with Self Defense HP's (with a spare mag just for piece of mind)

So what's all's opinion concerning my inquiry?
Thanks in advance for any input.