rip... go to the ammoman.com and look at the targets.. there is one that will explain your patterns.
As I said earlier, you are flinching or, anticipating the shot.. it may allso have to do with grip... you are either squeezing with your other fingers or relaxing to soon.
I tend to shoot to the left because my fingers are long and I can't get a decent trigger finger (too much finger).
but... just because you are a limp wristed flincher afraid of recoil doesn't make you less of a man in our eyes... Oh... wait... this is a little .40? nevermind.
lazs