Diagnosing one handed shooting error

[andy t]

I shot the following target one handed (strong hand) from ~11 yards.
I was aiming for center, but got a decen group around 11 o'clock high.
I can't figure out what I was doing wrong. I would appreciate feed back.

Thanks.

Photo of my target (http://picasaweb.google.com/lh/photo/0DNln6HxJ-6Xzke4x9ijzlhcz8yOpiSNk_7TzM4zgw8?feat=directlink)

[gtmtnbiker98]

I often times encounter issues with strong/weak hand shooting as well. Often enough, I find that I have too much finger on the trigger and I'm squeezing and not pulling. This is my experience FWIW.

[vigilant2]

see if this helps