Is shooting down and to the left a flinch or due to a hard trigger pull?
I’ve read much about this. A lighter trigger pull tends to fix this problem. My 1911, even though it is a heavier framed weapon, has a very very light trigger pull. I’m very accurate with this gun. If flinching while anticipating the recoil were the problem, it would be there regardless of trigger pull weight.
On a hard trigger pull a persons muscles in all fingers tend to contract which causes the hand to move minutely. Just enough to make the aim slightly off. I’ve learned that pulling the trigger with the tip of my finger seems to reduce this shooting error because only the first two joints of the finger move instead of the whole finger which may cause the hand to move a tad.
Dry firing and plenty of range time does help one’s aim.
A heavier trigger can aggravate the problem because you apply more pressure to make the trigger release when you think it should.
If you making it fire when you think it should you are flinching.
Many people shoot very heavy double actions trigger just fine.
They learn to control the desire to make the firearm go bang right now.