Since I'm still looking at the possibility of shooting my M&P40 in IDPA I am wondering how I can help myself in shooting against 9mm shooters. One idea that was mentioned to me was to download .40S&W to help fight off recoil. For those of you reloaders who shoot competition what kind of loadings would be a good place to start? Mainly looking for what is a typically good bullet weight preference 155, 165, 180 grain and is there any particular advantage to a HP or FMJ? Lastly, and this question came from the guy who is loading these for me, how much powder?