I just stumbled across this thread and I thought I would reignite the flame war. I am a 20 year LEO. One of my favorite carry guns is a light weight, J frame size revolver, but they all recoil horrifically with any +P loads. I recently purchased a Ruger LCR (and sold my S&W 340) since the LCR appreciably diminishes perceived recoil, though it is still rather stout.
I have also become convinced of the effectiveness of a 22WMR in a J frame size revolver for self defense purposes. The 22 WMR has near zero recoil which allows for quicker follow up shots. Additionally the the gun (S&W 351PD) carries seven rounds, as opposed to five.
One of the things I most like about the 351PD is that it allows the use of a a "lip grip", seen here.
http://www.collinscraftgrips.com/pi...ip=S&W+J+frame+round+butt+Lip+Grip+Dymondwood
Attempting to use a grip this small on any 38 is not only painful, but I have to readjust my hand after each round resulting in slow follow up shots.
Another benefit to the 22WMR is relatively less expensive ammo, and the ability to carry alot more of it...should that become necessary. To round out my "Bug Out" kit, I plan to buy one of these take down 22 Magnum rifles when they become available later this year:
http://www.majesticarms.com/id3.html
I have no doubt that a .38 would be more effective, but I also feel that a 22WMR is effective enough. No one wants to get shot! And I think there are some positive advantages to 7 rounds of 22WMR as opposed to five rounds of .38 +P. I feel well armed with either.