Revolver grip, stance, trigger control (and more) information site
scjfly
After struggling with the grip issue I've found a grip that does a good job for me. It also seems to be the best at activating the laser on demand. I've shared that with you.
Here's a link that may help more. These guys are all better shooters than me - no doubt about it.
http://www.shootingusa.com/
This, by the way, is a site that will be of interest to most everyone here I'll bet.
If you go to the Shooting USA website and look at the bottom of the page, there's a link for a series of shooting lessons from Jerry Miculek. If you click on the link a window opens with a series of lessons. One lesson is on revolver grip and it runs for 3 minutes and 15 seconds.
At the 1:24 left mark, Jerry goes over a grip for the J frame revolvers that seems to work very well. I've tried it on the J frames with success.
Also, the one on stance is of interest (as they all are). He talks about having the bore line follow right up the line of the shooting arm and having the arm extended rather than crooked to prevent muzzle flip. (The guy can really shoot a j-frame fast and straight, as the video shows.)
It's interesting how close his ("professional") ideas come to what I've been doing on my own (a little different and I'll experiment more for sure).
For what it's worth - I've tried it on a little Ruger LCP as well. I was having trouble getting the laser to activate reliably after a draw, but after changing to this grip I can reliably activate the laser and I can recover the dot from shot to shot simply by pinching down again with my left hand. The front to back "pinch" you can exert with this modified grip helps get that strong hand middle finger down on the activation button. The LCP sits high enough in the hand that the slide doesn't whack your thumb like it does on most automatics. It's nice to find a back up "pocket" auto that allows me to use the same grip that I use with the 340.
So far it's the best grip I've found for managing these small pistols.
Good luck!
MARV