Seafire
I have more than one .40 and more than one .45ACP and more than one 9mm. My carry guns are a G27 and a G30. I tend to carry the G27 more and it is loaded with HST +P 180g. If recoil is more "snappy", I don't think I would notice it under a SD situation at all.
Knowing you and your reloading tendencies in the long gun arena my guess is that you would have your .40 up and running in the middle range of 10mm and loving every minute of it before too long. Not sure if RL-7 would be the go to powder though.....you might have to venture into strange lands and test out some Power Pistol.
