Lot's of people believe its always the triggers finger for Low-Left hits.
A 7'oclock consistent hit can also be contributed to squeezing to hard on primary brace hand

To expand on point:
Take right hand and simulate "gun in hand", "finger on trigger".
tighten grip with slight emphasis on Middle(3rd) finger.
Notice how grip will slightly shift left.
Now add a slight hesitation or anticipation of shot, which have tendency to pull shots low.
If you are performing "From the draw" or quick "Double tap" type shots, a shooter may have the tendency to over grip and get caught in the moment.
If you have a grouping and a descent pattern, this can be remedied. Just means a slight concentration and relaxing needs to be accomplished.

Hope it helps