I am pretty new to the gun world. I have shot the 629 and am comfortable with it. I would like to keep the pistol loaded with the recognized best defensive round available. I realize there may be some discussion on that so I will settle on the top three. After all there are six places for shells.

First question: What is the best defensive round realizing I would likely be making the shot from my bed toward any intruder standing in the door-way 20-30 feet away?

My second question is what is the hottest round that should ever be shoot in this pistol?

I would like that round described in grains, and/or psi. There may be more appropriate terminology but I can sorta understand these two units of measure; of course, I would appreciate a more precise information if necessary.

Thank you,
Steve