well i had the same problem and instantly realized it was teh heavy trigger pull that was making me shoot low. I began to compensate by aiming the front sight higher then after I got used to the pull I noticed I could hit pretty much anywhere I wanted. Mind you though, my trigger is very heavy at close to 10 pounds..
I tried an IDPA competition and did ok for a beginner. I hit the targets with reasonable accuracy and made some shots I thought I would never make with my pistol.
To preserve liberty, it is essential that the whole body of people always possess arms, and be taught alike, especially when young, how to use them...’’
— Richard Henry Lee, 1787