shooting with non-dominant hand

Question
I am finding I have great inconsistencies when practicing shooting with my non-dominant hand.  I know it is not the piston (S&W M+P 9m Compact).  It is a wonderful piece.  

Since it is very accurate with 2 hand and dominant hand firing, that leaves only one possible problem .... me! When I am firing, I am lining up the front and rear sites. I am not anticipating or blinking, but (much to my embarrassment), I am not consistantly hitting the target.

I believe it has to have something to do with my trigger pull,but I'm failing to find any useful info on possible differences between dominant vs. non-dominant trigger pull.

I have been looking on line for articles on the subject, but my searches have either landed me in forums (usually a bunch of people talking around the subject), or links on how to shoot a basketball (not very helpful unless i want to use them in skeet shoots).

Can you help me out?  Do you have any tips/pointer or articles/books/dvd's, that will help me resolve this issue?  

Any info would be greatly appreciated!
Brenda

Answer
Your hand, arm, and how you grip the gun are all part of the equation that determines the impact point of the bullet when you fire a handgun. For example, even if you are using a two hand grip, if you hold the gun more tightly, less tightly, or your grip is a little further around the handle, or a little less far around the handle, the bullet impact point will be affected. The key is to try to do it always exactly the same way, and then to adjust the sights to put the bullet on the target.

Accordingly, the impact point will normally be a little different when you change among strong hand, two hand, or weak hand holds. So, without adjusting the sights, you may have to vary your aimpoint slightly depending upon which hold you are using.

But if you are talking about firing with the weak hand and having the impact point vary around compared to other firings with the weak hand, then that naturally means that your weak hand firing method is varying from one shot to the next. The best way to find out what is varying is to mount a video camera on a tripod to the side of your firing position, so that you record what happens over several shots, and then review the video. You may find that your grip is not consistent, or you may even find that you are flinching or dropping or raising aim as the shot breaks (even though you may have thought you were not doing that).

Regarding trigger squeeze, make sure that you are not placing the trigger into one of the finger joints, as many people do. The trigger should be squeezed with the pad of the finger before the first joint.

Hope this helps!

Dave