In previous posts, I discussed a S&W 686 2.5" that I recently acquired. I have since obtained a Fist #9 holster for it, and I have spent a fair amount of time at the range with it. It is quickly becoming my go to gun for ccw. I am interested in fellow members' opinions of the best self defense ammo from the short barrel 686. I have searched, but I am still interested in recent opinions. Recoil and muzzle blast are non issues for me (don't know why, but they just don't bother me in this gun). I am merely interested in stopping the threat (human) as quickly as possible with minimum over penetration. I have also done a lot of reading on the difference between the 125 vs 158gr rounds, and I am interested in people's opinion of over penetration risks between the two. Thanks in advance!