Jerry,
In my case, the 629 in the photo is used for bear defense. Before everyone rolls their eyes about hypothetical bear guns (lol), I actually bear hunt, and have had two bears climb the tree I was in 2 different times. I never had to shoot one, but came close in 2001. That gun will be going with me this year for my bowhunt in Maine. I am not worried about fast follow up shots, though I can empty the cylinder on it pretty quickly and on target. I am worried about a point-blank, bear-sniffing-at-my-boot, single shot to the head. The 4 inch 629 in .44 mag is perfect for that. I do agree that anything shorter might go too far in the recoil department for my taste, but to each his/her own.
Joel